ZOOM LENS AND IMAGING APPARATUS

Abstract

The zoom lens consists of, in order from an object side, a first lens group that has a positive refractive power, a second lens group that has a negative refractive power, a middle group that includes one or more lens groups, and a final lens group. The middle group has a positive refractive power as a whole throughout an entire zoom range. During zooming, a spacing between the first lens group and the second lens group changes, a spacing between the second lens group and the middle group changes, and a spacing between the middle group and the final lens group changes. The zoom lens satisfies predetermined conditional expressions.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2021-126036, filed on Jul. 30, 2021. The above application is hereby expressly incorporated by reference, in its entirety, into the present application.

BACKGROUND

Technical Field

The technique of the present disclosure relates to a zoom lens and an imaging apparatus.

Related Art

In the related art, as a zoom lens that can be used in an imaging apparatus such as a digital camera, a zoom lens described in JP2016-126278A below is known.

In recent years, there has been a demand for a telephoto zoom lens that has a longer focal length at a telephoto end and that maintains favorable optical performance while maintaining a small size configuration.

SUMMARY

The present disclosure has been made in view of the above circumstances, and it is an object of the present invention to provide a telephoto zoom lens, which has a small size, has a longer focal length at the telephoto end, and maintains favorable optical performance, and an imaging apparatus comprising a telephoto zoom lens.

According to one aspect of the present disclosure, there is provided a zoom lens consisting of, in order from an object side to an image side: a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; a middle group that includes one or more lens groups; and a final lens group. The middle group has a positive refractive power as a whole throughout an entire zoom range, during zooming, a spacing between the first lens group and the second lens group changes, a spacing between the second lens group and the middle group changes, and a spacing between the middle group and the final lens group changes, and in a case where the middle group includes a plurality of lens groups, all spacings of adjacent lens groups in the middle group change during zooming. Assuming that a maximum image height is IH, and a focal length of a whole system in a state in which an infinite distance object is in focus at a telephoto end is ft, Conditional Expression (1) is satisfied, which is represented by

0.011<IH/ft<0.042   (1).

It is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (1-1).

0.017<IH/ft<0.036   (1-1)

It is preferable that the middle group includes at least one lens group that has a positive refractive power.

It is preferable that the final lens group has a negative refractive power.

It is preferable that the first lens group remains stationary with respect to an image plane during zooming.

It is preferable that the middle group includes at least one lens group that has a positive refractive power. In a case where a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, it is preferable that the zoom lens of the above-mentioned aspect includes a stop closer to the image side than a lens disposed closest to the image side in the PA lens group.

Assuming that a distance on an optical axis from a lens surface closest to the object side in the first lens group to a lens surface closest to the image side in the first lens group is DG1, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (2), which is represented by

0.6<DG1/IH<2.5   (2).

It is more preferable that the zoom lens satisfies Conditional Expression (2-1), which is represented by

0.7<DG1/IH<2.2   (2-1).

It is preferable that the middle group includes at least one lens group that has a positive refractive power. In a case where a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, it is preferable that the zoom lens of the above-mentioned aspect includes at least one focusing group that moves along an optical axis during focusing, at a position closer to the image side than a lens disposed closest to the image side in the PA lens group.

Assuming that a lateral magnification of the focusing group in a state in which the infinite distance object is in focus at the telephoto end is βft, a combined lateral magnification of all lenses closer to the image side than the focusing group in a state in which the infinite distance object is in focus at the telephoto end is βfrt, βfrt=1 in a case where the lens is not disposed closer to the image side than the focusing group, B is defined to be represented by B=|(1−βft²)=βfrt²|, and B in the focusing group in which B is a maximum value among the focusing groups included in the zoom lens is Bm in a case where the zoom lens includes a plurality of the focusing groups, and B=Bm in a case where the zoom lens includes only one focusing group, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (3), which is represented by

3.5<Bm<10   (3).

It is more preferable that the zoom lens satisfies Conditional Expression (3-1), which is represented by

3.8<Bm<9.4   (3-1).

It is preferable that the middle group includes at least one lens group that has a positive refractive power. In a case where a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, it is preferable that the zoom lens of the above-mentioned aspect includes a vibration-proof group that moves in a direction intersecting with an optical axis during image blur correction, at a position closer to the image side than a lens disposed closest to the image side in the PA lens group.

Assuming that a lateral magnification of the vibration-proof group in a state in which the infinite distance object is in focus at the telephoto end is βist, a combined lateral magnification of all lenses closer to the image side than the vibration-proof group in a state in which the infinite distance object is in focus at the telephoto end is βisrt, and βisrt=1 in a case where the lens is not disposed closer to the image side than the vibration-proof group, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (4), which is represented by

1.7<|(1−βist)×βisrt|<4.8   (4).

It is preferable that the vibration-proof group consists of one positive lens and two negative lenses.

Assuming that an Abbe number of a positive lens of the first lens group based on a d line is ν1p, it is preferable that the zoom lens of the above-mentioned aspect includes at least one positive lens satisfying Conditional Expression (5), which is represented by

81.7<ν1p<105   (5).

Assuming that an average value of Abbe numbers of all positive lenses of the first lens group based on a d line is ν1pave, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (6), which is represented by

81.7<ν1pave<105   (6).

Assuming that an Abbe number of a positive lens of the first lens group based on a d line is ν1p and a partial dispersion ratio thereof between a g line and an F line is θp, and

Δθ1p=θ1p+0.00162×v1p−0.64159,

it is preferable that the zoom lens of the above-mentioned aspect includes at least one positive lens satisfying Conditional Expression (7), which is represented by

0.03<Δθ1p<0.06   (7).

Assuming that an Abbe number of a positive lens of the first lens group based on a d line is ν1p and a partial dispersion ratio thereof between a g line and an F line is θ1p,

Δθ1p=θ1p+0.00162×ν1p−0.64159, and

an average value of Δθ1p of all positive lenses of the first lens group is Δθ1pave,

it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (8), which is represented by

0.03<Δθ1pave<0.06   (8).

It is preferable that the middle group includes at least one lens group that has a positive refractive power. Assuming that an Abbe number of a positive lens disposed in a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group based on a d line is νMp, it is preferable that the zoom lens of the above-mentioned aspect includes at least one positive lens satisfying Conditional Expression (9), which is represented by

81.7<νMp<105   (9).

It is preferable that the middle group includes at least one lens group that has a positive refractive power. Assuming that an average value of Abbe numbers of all positive lenses disposed in a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group based on a d line is νMpave, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (10), which is represented by

81.7<νMpave<105   (10).

It is preferable that the middle group includes at least one lens group that has a positive refractive power. Assuming that an Abbe number of a positive lens disposed in a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group based on a d line is νMp and a partial dispersion ratio thereof between a g line and an F line is θMp, and

ΔθMp=θMp+0.00162×νMp−0.64159,

it is preferable that the zoom lens of the above-mentioned aspect includes at least one positive lens satisfying Conditional Expression (11), which is represented by

0.014<ΔθMp<0.06   (11).

It is preferable that the middle group includes at least one lens group that has a positive refractive power. Assuming that an Abbe number of a positive lens disposed in a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group based on a d line is νMp and a partial dispersion ratio thereof between a g line and an F line is θMp, and

ΔθMp=θMp+0.00162×νMp−0.64159, and

an average value of ΔθMp of all positive lenses of a lens group that has a strongest refractive power among the lens groups that have positive refractive powers and that are included in the middle group is ΔθMpave,

it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (12), which is represented by

0.014<ΔθMpave<0.06   (12).

It is preferable that the first lens group includes at least one negative lens. Assuming that a refractive index of a negative lens of the first lens group at a d line is N1n, it is preferable that the zoom lens of the above-mentioned aspect includes at least one negative lens satisfying Conditional Expression (13), which is represented by

1.55<N1n<1.8   (13).

It is preferable that the second lens group includes at least one positive lens. Assuming that an Abbe number of the positive lens of the second lens group based on a d line is ν2p, it is preferable that the zoom lens of the above-mentioned aspect includes at least one positive lens satisfying Conditional Expression (14), which is represented by

15<ν2p<25   (14).

It is preferable that the second lens group includes at least one positive lens. Assuming that an Abbe number of a positive lens of the second lens group based on a d line is ν2p and a partial dispersion ratio thereof between a g line and an F line is θ2p, and

Δθ2p=θ2p+0.00162×ν2p−0.64159,

it is preferable that the zoom lens of the above-mentioned aspect includes at least one positive lens satisfying Conditional Expression (15), which is represented by

0.015<Δθ2p<0.06   (15).

Assuming that an Abbe number of a negative lens of the second lens group based on a d line is ν2n, it is preferable that the zoom lens of the above-mentioned aspect includes at least one negative lens satisfying Conditional Expression (16), which is represented by

70<ν2n<105   (16).

Assuming that an Abbe number of a negative lens of the second lens group based on a d line is ν2n and a partial dispersion ratio thereof between a g line and an F line is θ2n, and

Δθ2n=θ2n+0.00162×ν2n−0.64159,

it is preferable that the zoom lens of the above-mentioned aspect includes at least one negative lens satisfying Conditional Expression (17), which is represented by

0.03<Δθ2n<0.06   (17).

Assuming that a lateral magnification of the final lens group in a state in which the infinite distance object is in focus at the telephoto end is βEt, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (18), which is represented by

1.4<βEt<4.7   (18).

It is preferable that the middle group includes at least one lens group that has a positive refractive power. Assuming that a focal length of a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group is fMp, and a focal length of the whole system in a state in which the infinite distance object is in focus at a wide angle end is fw, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (19), which is represented by

0.1<fMp/(fw×ft)^1/2<0.7   (19).

Assuming that a lateral magnification of the second lens group in a state in which the infinite distance object is in focus at the telephoto end is β2t, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (20), which is represented by

0.9<|β2t|<4.6   (20).

It is preferable that the zoom lens includes a vibration-proof group that moves in a direction intersecting with an optical axis during image blur correction, and it is preferable that the zoom lens of the above-mentioned aspect includes a stationary group that is disposed adjacent to the vibration-proof group on the image side of the vibration-proof group, that has a refractive power of which a sign is opposite to a sign of a refractive power of the vibration-proof group, and that remains stationary with respect to an image plane during zooming and focusing. Assuming that a focal length of the vibration-proof group is fis, and a focal length of the stationary group is fisr, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (21), which is represented by

0.32<|fis/fisr|<1.1   (21).

It is preferable that the first lens group includes at least one negative lens. Assuming that a center thickness of a negative lens disposed closest to the object side among negative lenses included in the first lens group is D1n, and an F number in a state in which the infinite distance object is in focus at the telephoto end is FNot, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (22), which is represented by

0.01<D1n/(ft/FNot)<0.04   (22).

It is preferable that a single lens that has a negative refractive power is disposed closest to the object side in the first lens group.

Assuming that a focal length of the middle group in a state in which the infinite distance object is in focus at a wide angle end is fMw, a focal length of the middle group in a state in which the infinite distance object is in focus at the telephoto end is fMt, and a focal length of the whole system in a state in which the infinite distance object is in focus at the wide angle end is fw, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (23), which is represented by

0.16<(fMw×fMt)^1/2/(fw×ft)^1/2<0.3   (23).

It is preferable that the middle group includes at least one lens group that has a positive refractive power, and a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group. Assuming that a focal length of the PA lens group is fPA, and a focal length of the second lens group is f2, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (24), which is represented by

0.25<|f2|/fPA<3   (24).

It is preferable that the final lens group remains stationary with respect to an image plane during zooming.

It is preferable that the second lens group and all lens groups in the middle group move during zooming.

It is preferable that the middle group includes at least one lens group that has a positive refractive power. In a case where a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, it is preferable that a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group is the PA lens group.

Assuming that a sum of a back focal length of the whole system at an air-equivalent distance and a distance on an optical axis from a lens surface closest to the object side in the first lens group to a lens surface closest to the image side in the final lens group in a state in which the infinite distance object is in focus at the telephoto end is TLt, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (25), which is represented by

0.42<TLt/ft<0.94   (25).

It is preferable that the first lens group includes, in order from the object side to the image side, a negative lens, a positive lens, and a positive lens.

It is preferable that the first lens group consists of, in order from the object side to the image side, a negative lens, a positive lens, and a positive lens.

It is preferable that the zoom lens includes at least one focusing group that moves along an optical axis during focusing, and the at least one focusing group consists of two or fewer lenses.

Assuming that a focal length of the final lens group is fE, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (26), which is represented by

0.02<|fE|/ft<0.2   (26).

It is preferable that the zoom lens includes at least one focusing group that moves along an optical axis during focusing, and the at least one focusing group has a negative refractive power.

It is preferable that the zoom lens includes a vibration-proof group that moves in a direction intersecting with an optical axis during image blur correction, and the vibration-proof group has a negative refractive power.

The middle group may be configured to include at least two lens groups that have positive refractive powers.

All of lens groups included in the middle group may be configured to be lens groups that have positive refractive powers.

In the final lens group, at least one focusing group that moves along an optical axis during focusing and a vibration-proof group that moves in a direction intersecting with the optical axis during image blur correction may be configured to be disposed. In that case, it is preferable that at least one focusing group is disposed closer to the object side than the vibration-proof group.

It is preferable that the middle group includes at least one lens group that has a positive refractive power, and a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group includes at least three positive lenses and at least one negative lens.

Assuming that a lateral magnification of the second lens group in a state in which the infinite distance object is in focus at the telephoto end is β2t, and a lateral magnification of the second lens group in a state in which the infinite distance object is in focus at a wide angle end is β2w, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (27), which is represented by

2.5<β2t/β2w<7.9   (27).

It is preferable that the middle group includes at least one lens group that has a positive refractive power, and a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group. Assuming that a combined lateral magnification of all lenses closer to the image side than the PA lens group in a state in which the infinite distance object is in focus at the telephoto end is βPArt, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (28), which is represented by

0.8<βPArt<4.5   (28).

Assuming that a focal length of the first lens group is f1, and a focal length of the whole system in a state in which the infinite distance object is in focus at the wide angle end is fw, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (29), which is represented by

0.43<f1/(fw×ft)^1/2<1.03   (29).

Assuming that a focal length of the second lens group is f2, and a focal length of the whole system in a state in which the infinite distance object is in focus at a wide angle end is fw, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (30), which is represented by

0.23<|f2|/fw<0.66   (30).

It is preferable that the zoom lens includes at least one focusing group that moves along an optical axis during focusing, and the at least one focusing group consists of one negative lens and one positive lens. Assuming that a focal length of the positive lens of the focusing group consisting of one negative lens and one positive lens is ffp, and a focal length of the negative lens of the focusing group consisting of one negative lens and one positive lens is ffn, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (31), which is represented by

0.9<ffp/|ffn|<2.8   (31).

Assuming that a focal length of the first lens group is f1, and a focal length of the second lens group is f2, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (32), which is represented by

2.1<f1/|f2|<4.8   (32).

Assuming that a focal length of the second lens group is f2, and a focal length of the whole system in a state in which the infinite distance object is in focus at a wide angle end is fw, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (33), which is represented by

0.13<|f2|/(fw×ft)^1/2<0.32   (33).

It is preferable that the middle group includes at least one lens group that has a positive refractive power, and a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group. Assuming that a focal length of the PA lens group is fPA, and a focal length of the whole system in a state in which the infinite distance object is in focus at the wide angle end is fw, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (34), which is represented by

0.12<fPA/(fw×ft)^1/2<0.45   (34).

Assuming that a focal length of the final lens group is fE, and a focal length of the whole system in a state in which the infinite distance object is in focus at the wide angle end is fw, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (35), which is represented by

0.06<|fE|/(fw×ft)^1/2<0.25   (35).

It is preferable that the zoom lens includes at least one focusing group that moves along an optical axis during focusing. Assuming that a focal length of the focusing group is ff, and a focal length of the whole system in a state in which the infinite distance object is in focus at a wide angle end is fw, it is preferable that the zoom lens of the above-mentioned aspect includes at least one focusing group satisfying Conditional Expression (36), which is represented by

0.14<|ff|/(fw×ft)^1/2<0.7   (36).

It is preferable that the zoom lens includes a vibration-proof group that moves in a direction intersecting with an optical axis during image blur correction. Assuming that a focal length of the vibration-proof group is fis, and a focal length of the whole system in a state in which the infinite distance object is in focus at a wide angle end is fw, it is preferable that the zoom lens of the above-mentioned aspect satisfies Conditional Expression (37), which is represented by

0.05<|fis|(fw×ft)^1/2<0.15   (37).

It is preferable that the middle group includes a lens pair consisting of a negative lens and a positive lens that are adjacent to each other with an air spacing interposed therebetween. Assuming that a spacing on an optical axis of the air spacing in the lens pair of the middle group is DMnp, a curvature radius of an object side surface of an air lens formed by the air spacing in the lens pair of the middle group is RMnpf, and a curvature radius of an image side surface of the air lens formed by the air spacing in the lens pair of the middle group is RMnpr, it is preferable that the zoom lens of the above-mentioned aspect includes at least one lens pair satisfying Conditional Expression (38), which is represented by

0.002<DMnp/(RMnpf+RMnpr)<0.1   (38).

It is preferable that the final lens group includes a lens pair consisting of a negative lens and a positive lens that are adjacent to each other with an air spacing interposed therebetween. Assuming that a spacing on an optical axis of the air spacing in the lens pair of the final lens group is DEnp, a curvature radius of an object side surface of an air lens formed by the air spacing in the lens pair of the final lens group is REnpf, and a curvature radius of an image side surface of the air lens formed by the air spacing in the lens pair of the final lens group is REnpr, it is preferable that the zoom lens of the above-mentioned aspect includes at least one lens pair satisfying Conditional Expression (39), which is represented by

−0.5<DEnp/(REnpf+REnpr)<−0.01   (39).

The imaging apparatus according to another aspect of the present disclosure includes a zoom lens according to the above-mentioned aspect of the present disclosure.

In the present specification, it should be noted that the terms “consisting of” and “consists of” mean that the lens may include not only the above-mentioned components but also lenses substantially having no refractive powers, optical elements, which are not lenses, such as a stop, a filter, and a cover glass, and mechanism parts such as a lens flange, a lens barrel, an imaging element, and a camera shaking correction mechanism.

In the present specification, the terms “group that has a positive refractive power” and “group has a positive refractive power” mean that the group as a whole has a positive refractive power. Similarly, the terms “group that has a negative refractive power” and “group has a negative refractive power” mean that the group as a whole has a negative refractive power. The term “a lens that has a positive refractive power” and the term “a positive lens” are synonymous. The term “a lens that has a negative refractive power” and the term “negative lens” are synonymous. Each of the terms “first lens group”, “second lens group”, “middle group”, “lens group”, “final lens group”, “focusing group”, “vibration-proof group”, and “stationary group” in the present specification is not limited to a configuration consisting of a plurality of lenses, but may be a configuration consisting of only one lens.

The term “a single lens” means one lens that is not cemented. Here, a compound aspherical lens (a lens in which a spherical lens and an aspherical film formed on the spherical lens are integrally formed and function as one aspherical lens as a whole) is not regarded as cemented lenses, but the compound aspherical lens is regarded as one lens. The curvature radius, the sign of the refractive power, and the surface shape of the lens including the aspherical surface will be used in terms of the paraxial region unless otherwise specified. The sign of the curvature radius of the convex surface facing toward the object side is positive, and the sign of the curvature radius of the convex surface facing toward the image side is negative.

In the present specification, the term “whole system” means “zoom lens”. The “back focal length at the air-equivalent distance” is the air-equivalent distance on the optical axis from the lens surface closest to the image side in the whole system to the image plane. The “focal length” used in a conditional expression is a paraxial focal length. The values used in Conditional Expressions are values in a case where the d line is used as a reference in a state in which the infinite distance object is in focus unless otherwise specified.

According to the present disclosure, it is possible to provide a telephoto zoom lens which has a small size, has a longer focal length at the telephoto end, and maintains favorable optical performance, and an imaging apparatus including the zoom lens.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view showing a configuration of a zoom lens according to an embodiment and a diagram showing movement loci thereof, the zoom lens corresponding to a zoom lens of Example 1.

FIG. 2 is a diagram showing a configuration and a luminous flux in each zooming state of the zoom lens of FIG. 1.

FIG. 3 is a diagram for explaining a maximum image height.

FIG. 4 is a diagram showing aberrations of the zoom lens of Example 1.

FIG. 5 is a cross-sectional view of a configuration of a zoom lens of Example 2 and a diagram showing movement loci thereof.

FIG. 6 is a diagram showing aberrations of the zoom lens of Example 2.

FIG. 7 is a cross-sectional view of a configuration of a zoom lens of Example 3 and a diagram showing movement loci thereof.

FIG. 8 is a diagram showing aberrations of the zoom lens of Example 3.

FIG. 9 is a cross-sectional view of a configuration of a zoom lens of Example 4 and a diagram showing movement loci thereof.

FIG. 10 is a diagram showing aberrations of the zoom lens of Example 4.

FIG. 11 is a cross-sectional view of a configuration of a zoom lens of Example 5 and a diagram showing movement loci thereof.

FIG. 12 is a diagram showing aberrations of the zoom lens of Example 5.

FIG. 13 is a cross-sectional view of a configuration of a zoom lens of Example 6 and a diagram showing movement loci thereof.

FIG. 14 is a diagram showing aberrations of the zoom lens of Example 6.

FIG. 15 is a cross-sectional view of a configuration of a zoom lens of Example 7 and a diagram showing movement loci thereof.

FIG. 16 is a diagram showing aberrations of the zoom lens of Example 7.

FIG. 17 is a cross-sectional view of a configuration of a zoom lens of Example 8 and a diagram showing movement loci thereof.

FIG. 18 is a diagram showing aberrations of the zoom lens of Example 8.

FIG. 19 is a cross-sectional view of a configuration of a zoom lens of Example 9 and a diagram showing movement loci thereof.

FIG. 20 is a diagram showing aberrations of the zoom lens of Example 9.

FIG. 21 is a cross-sectional view of a configuration of a zoom lens of Example 10 and a diagram showing movement loci thereof.

FIG. 22 is a diagram showing aberrations of the zoom lens of Example 10.

FIG. 23 is a cross-sectional view of a configuration of a zoom lens of Example 11 and a diagram showing movement loci thereof.

FIG. 24 is a diagram showing aberrations of the zoom lens of Example 11.

FIG. 25 is a cross-sectional view of a configuration of a zoom lens of Example 12 and a diagram showing movement loci thereof.

FIG. 26 is a diagram showing aberrations of the zoom lens of Example 12.

FIG. 27 is a cross-sectional view of a configuration of a zoom lens of Example 13 and a diagram showing movement loci thereof.

FIG. 28 is a diagram showing aberrations of the zoom lens of Example 13.

FIG. 29 is a cross-sectional view of a configuration of a zoom lens of Example 14 and a diagram showing movement loci thereof.

FIG. 30 is a diagram showing aberrations of the zoom lens of Example 14.

FIG. 31 is a cross-sectional view of a configuration of a zoom lens of Example 15 and a diagram showing movement loci thereof.

FIG. 32 is a diagram showing aberrations of the zoom lens of Example 15.

FIG. 33 is a cross-sectional view of a configuration of a zoom lens of Example 16 and a diagram showing movement loci thereof.

FIG. 34 is a diagram showing aberrations of the zoom lens of Example 16.

FIG. 35 is a cross-sectional view of a configuration of a zoom lens of Example 17 and a diagram showing movement loci thereof.

FIG. 36 is a diagram showing aberrations of the zoom lens of Example 17.

FIG. 37 is a cross-sectional view of a configuration of a zoom lens of Example 18 and a diagram showing movement loci thereof.

FIG. 38 is a diagram showing aberrations of the zoom lens of Example 18.

FIG. 39 is a cross-sectional view of a configuration of a zoom lens of Example 19 and a diagram showing movement loci thereof.

FIG. 40 is a diagram showing aberrations of the zoom lens of Example 19.

FIG. 41 is a cross-sectional view of a configuration of a zoom lens of Example 20 and a diagram showing movement loci thereof.

FIG. 42 is a diagram showing aberrations of the zoom lens of Example 20.

FIG. 43 is a perspective view of a front side of an imaging apparatus according to an embodiment.

FIG. 44 is a perspective view of a rear side of the imaging apparatus according to the embodiment.

DESCRIPTION OF EMBODIMENTS

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

FIG. 1 shows a cross-sectional view of a configuration and movement loci of a zoom lens according to an embodiment of the present disclosure at a wide angle end. Further, FIG. 2 shows a cross-sectional view and a luminous flux of the configuration of the zoom lens of FIG. 1 in each state. In FIG. 2, the upper part labeled “wide angle end” shows a wide angle end state, and the lower part labeled “telephoto end” shows a telephoto end state. FIG. 2 shows, as the luminous flux, an on-axis luminous flux wa and a luminous flux wb with a maximum image height IH in the wide angle end state and an on-axis luminous flux to and a luminous flux tb with the maximum image height in the telephoto end state. The examples shown in FIGS. 1 and 2 correspond to a zoom lens of Example 1 described later. FIGS. 1 and 2 show situations where an infinite distance object is in focus, the left side thereof is an object side, and the right side thereof is an image side. Hereinafter, the zoom lens according to the embodiment of the present disclosure will be described mainly with reference to FIG. 1.

FIG. 1 shows an example in which an optical member PP of which the incident surface and emission surface are parallel is disposed between the zoom lens and an image plane Sim under the assumption that the zoom lens is applied to an imaging apparatus. The optical member PP is a member assumed to include various filters, a cover glass, and/or the like. The various filters include a low pass filter, an infrared cut filter, and/or a filter that cuts a specific wavelength region. The optical member PP is a member that has no refractive power. It is also possible to configure the imaging apparatus by removing the optical member PP.

The zoom lens of the present disclosure consists of, in order from the object side to the image side along an optical axis Z, a first lens group G1 that has a positive refractive power, a second lens group G2 that has a negative refractive power, a middle group GM that includes one or more lens groups, and a final lens group GE. The middle group GM has a positive refractive power as a whole throughout the entire zoom range. During zooming, the spacing between the first lens group G1 and the second lens group G2 changes, the spacing between the second lens group G2 and the middle group GM changes, and the spacing between the middle group GM and the final lens group GE changes. Further, in a case where the middle group GM includes a plurality of lens groups, all the spacings of adjacent lens groups in the middle group GM change during zooming. According to the above-mentioned configuration, there is an advantage in achieving an increase in focal length at the telephoto end, and there is also an advantage in realizing a zoom lens having a high zoom ratio while maintaining reduction in size.

The “first lens group G1”, “second lens group G2”, “lens groups” included in the middle group GM, and “final lens group GE” in the present specification are constituent parts of the zoom lens, and are parts which are separated by the air spacings that change during zooming, and each of which includes at least one lens. During zooming, each lens group moves or remains stationary, and the mutual spacing between the lenses in each lens group does not change. That is, in the present specification, one lens group is a group in which the spacing between adjacent groups changes during zooming and the total spacing between adjacent lenses does not change within itself.

For example, the zoom lens of FIG. 1 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. In the example of FIG. 1, the middle group GM consists of a third lens group G3 and a fourth lens group G4, and the final lens group GE consists of a fifth lens group G5.

For example, each lens group in FIG. 1 is composed of lenses described below. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side. The aperture stop St shown in FIG. 1 does not indicate the shape and size, but indicates the position in an optical axis direction.

In the example of FIG. 1, during zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. A grounding symbol under each of the first lens group G1 and the fifth lens group G5 in FIG. 1 indicates that the lens group remains stationary with respect to the image plane Sim during zooming. A curved arrow under each of the second lens group G2, the third lens group G3, and the fourth lens group G4 in FIG. 1 shows an approximate movement locus of each of these lens groups during zooming from the wide angle end to the telephoto end.

During zooming, it is preferable that the first lens group G1 remains stationary with respect to the image plane Sim. In such a case, fluctuation in center of gravity of the lens system during zooming can be reduced. Therefore, the convenience during imaging can be enhanced.

During zooming, it is preferable that the second lens group G2 and all the lens groups in the middle group GM move. In such a case, it is possible to suppress fluctuation in aberrations during zooming.

During zooming, it is preferable that the final lens group GE remains stationary with respect to the image plane Sim. In such a case, it is easy to simplify a mechanism for operating each lens group during zooming.

It is preferable that the middle group GM includes at least one lens group that has a positive refractive power. In such a case, there is an advantage in obtaining a high zoom ratio while maintaining reduction in size.

It is preferable that the middle group GM includes at least two lens groups that have positive refractive powers. In such a case, there is an advantage in suppressing spherical aberration.

The lens group included in the middle group GM may be configured to be a lens group that has a positive refractive power. With such a configuration, there is an advantage in achieving reduction in size.

In a case where the middle group GM includes at least one lens group that has a positive refractive power, a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group GM includes at least three positive lenses and at least one negative lens. In such a case, there is an advantage in correcting longitudinal chromatic aberration.

In a case where there is only one lens group that has a positive refractive power included in the middle group GM, the only one lens group that has a positive refractive power is referred to as “a lens group that has the strongest refractive power among the lens groups that have positive refractive powers and that are included in the middle group GM”. The point is the same in the following description.

In the present specification, among the lens groups that have positive refractive powers and that are included in the middle group GM, the lens group disposed closest to the object side is referred to as a PA lens group GPA. In the example of FIG. 1, the third lens group G3 corresponds to the PA lens group GPA.

Among the lens groups that have positive refractive powers and that are included in the middle group GM, it is preferable that the lens group that has the strongest refractive power is the PA lens group GPA. In such a case, there is an advantage in achieving reduction in size.

It is preferable that the zoom lens includes an aperture stop St closer to the image side than a lens disposed closest to the image side in the PA lens group GPA. In such a case, it is easy to reduce the diameter of the aperture stop St, and there is an advantage in achieving reduction in size. For example, the aperture stop St in FIG. 1 is disposed closest to the object side in the final lens group GE.

It is preferable that the final lens group GE has a negative refractive power. In such a case, there is an advantage in achieving reduction in size of the middle group GM.

It is preferable that the zoom lens includes at least one focusing group that moves along the optical axis Z during focusing from an infinite distance object to a close range object. It is preferable that the focusing group consists of two or fewer lenses. In such a case, there is an advantage in achieving reduction in weight of the focusing group. Further, at least one focusing group may be configured to have a negative refractive power. In such a case, the positive refractive power of the group on the object side of the focusing group becomes stronger. Therefore, a more concentrated luminous flux is incident on the focusing group. As a result, the effective diameter of the focusing group can be reduced, and there is an advantage in achieving reduction in weight of the focusing group.

It is preferable that the zoom lens includes at least one focusing group that moves along the optical axis Z during focusing, at a position closer to the image side than the lens disposed closest to the image side in the PA lens group GPA. In such a case, there is an advantage in achieving reduction in size of the focusing group. For example, the focusing group of FIG. 1 consists of two lenses L51 and L52. The parentheses and right-pointing arrows below the lenses L51 and L52 in FIG. 1 indicate that the focusing group consists of these two lenses and that the focusing group moves toward the image side during focusing from the infinite distance object to the close range object.

It is preferable that the zoom lens includes a vibration-proof group that moves in a direction intersecting with the optical axis Z during image blur correction. It is preferable that the vibration-proof group has a negative refractive power. In such a case, the positive refractive power of the group on the object side of the vibration-proof group becomes strong. Therefore, a more concentrated luminous flux is incident on the vibration-proof group. As a result, the effective diameter of the vibration-proof group can be reduced, and there is an advantage in achieving reduction in weight of the vibration-proof group.

It is preferable that the zoom lens includes a vibration-proof group that moves in a direction intersecting with the optical axis Z during image blur correction, at a position closer to the image side than the lens disposed closest to the image side in the PA lens group GPA. In such a case, there is an advantage in achieving reduction in size of the vibration-proof group. For example, the vibration-proof group of FIG. 1 consists of three lenses L55 to L57. The parentheses and double-headed arrows below the lenses L55 to L57 in FIG. 1 indicate that the vibration-proof group consists of these three lenses.

In the final lens group GE, at least one focusing group that moves along the optical axis Z during focusing and a vibration-proof group that moves in a direction intersecting with the optical axis Z during image blur correction may be configured to be disposed. In such a case, since the mechanism can be packed in a constituent unit of one lens group, it is easy to simplify a mechanism for operating the lens groups during zooming. As described above, in a case where the final lens group GE includes at least one focusing group and the vibration-proof group, it is preferable that at least one focusing group is disposed closer to the object side than the vibration-proof group. In such a case, there is an advantage in achieving reduction in size of the vibration-proof group.

Next, preferable and possible configurations regarding conditional expressions of the zoom lens of the present disclosure will be described. In the following description of conditional expressions, in order to avoid redundant descriptions, the same symbols are used for those having the same definition, and some duplicate descriptions of the symbols will not be repeated. Further, in the following description, the term “zoom lens of the present disclosure” is also simply referred to as a “zoom lens” in order to avoid redundant description.

Assuming that a maximum image height is IH and a focal length of the whole system in a state in which the infinite distance object is in focus at the telephoto end is ft, it is preferable that the zoom lens satisfies Conditional Expression (1). By not allowing the corresponding value of Conditional Expression (1) to be equal to or less than the lower limit, there is an advantage in achieving reduction in size while suppressing various aberrations. By not allowing the corresponding value of Conditional Expression (1) to be equal to or greater than the upper limit, it is easy to capture an image of a distant subject in an enlarged manner. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (1-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (1-2).

0.011<IH/ft<0.042   (1)

0.017<IH/ft<0.036   (1-1)

0.021<IH/ft<0.031   (1-2)

For example, the upper part of FIG. 2 shows the maximum image height IH. In the present specification, the maximum image height IH is a half number of the length that is the longest in the linear distance in the imaging region used as a captured image in the image plane Sim. For example, in a case where the imaging region is rectangular, the half number of the diagonal length is the maximum image height IH, and in a case where the imaging region is circular, the radius is the maximum image height IH. Even in a case where a region 3 having a barrel shape in the plane perpendicular to the optical axis Z as shown in FIG. 3 is used as the imaging region, the half number of the longest linear distance in the region is the maximum image height IH. Further, in a case of an imaging apparatus in which the imaging region used as the captured image is moved in a direction intersecting with the optical axis Z to perform image blur correction, the value is set in a state in which image blur correction is not performed.

Assuming that a distance on the optical axis from the lens surface closest to the object side in the first lens group G1 to the lens surface closest to the image side in the first lens group G1 is DG1 and the maximum image height is IH, it is preferable that the zoom lens satisfies Conditional Expression (2). By not allowing the corresponding value of Conditional Expression (2) to be equal to or less than the lower limit, there is an advantage in suppressing longitudinal chromatic aberration. By not allowing the corresponding value of Conditional Expression (2) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in weight. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (2-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (2-2).

0.6<DG1/IH<2.5   (2)

0.7<DG1/IH<2.2   (2-1)

0.76<DG1/IH<2.03   (2-2)

It is preferable that the zoom lens satisfies Conditional Expression (3) with respect to the focusing group. Here, it is assumed that a lateral magnification of the focusing group in a state in which the infinite distance object is in focus at the telephoto end is βft, and a combined lateral magnification of all lenses closer to the image side than the focusing group in a state in which the infinite distance object is in focus at the telephoto end is βfrt. In a case where the lens is not disposed closer to the image side than the focusing group, βfrt=1. Then, B is defined to be represented by B=|(1−βft²)×βfrt²|. B in the focusing group in which B is a maximum value among the focusing groups included in the zoom lens is Bm in a case where the zoom lens includes a plurality of the focusing groups, and B=Bm in a case where the zoom lens includes only one focusing group. B defined above is a ratio of the amount of movement of the image plane to the unit amount of movement of the focusing group. By not allowing the corresponding value of Conditional Expression (3) to be equal to or less than the lower limit, there is an advantage in achieving reduction in size. By not allowing the corresponding value of Conditional Expression (3) to be equal to or greater than the upper limit, there is an advantage in suppressing fluctuation in aberrations during focusing. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (3-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (3-2).

3.5<Bm<10   (3)

3.8<Bm<9.4   (3-1)

4.2<Bm<9.2   (3-2)

It is preferable that the zoom lens satisfies Conditional Expression (4) with respect to the vibration-proof group. Here, it is assumed that a lateral magnification of the vibration-proof group in a state in which the infinite distance object is in focus at the telephoto end is βist, and a combined lateral magnification of all lenses closer to the image side than the vibration-proof group in a state in which the infinite distance object is in focus at the telephoto end is βisrt. In a case where the lens is not disposed closer to the image side than the vibration-proof group, βisrt=1. By not allowing the corresponding value of Conditional Expression (4) to be equal to or less than the lower limit, there is an advantage in suppressing the amount of movement of the vibration-proof group during image blur correction. By not allowing the corresponding value of Conditional Expression (4) to be equal to or greater than the upper limit, there is an advantage in suppressing fluctuation in aberrations during image blur correction. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (4-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (4-2).

1.7<|(1−βist)×βisr|<4.8   (4)

1.9<|(1−βist)×βisr|<4   (4-1)

2.1<|(1−βist)×βisr|<3.7   (4-2)

Assuming that an Abbe number of the positive lens of the first lens group G1 based on a d line is ν1p, it is preferable that the zoom lens includes at least one positive lens satisfying Conditional Expression (5). By not allowing the corresponding value of Conditional Expression (5) to be equal to or less than the lower limit, there is an advantage in suppressing longitudinal chromatic aberration. By not allowing the corresponding value of Conditional Expression (5) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that at least one positive lens satisfying Conditional Expression (5) satisfies Conditional Expression (5-1), and it is yet more preferable that the lens satisfies Conditional Expression (5-2).

81.7<ν1p<105   (5)

83<ν1p<103   (5-1)

89<ν1p<101   (5-2)

Assuming that an average value of Abbe numbers of all the positive lenses of the first lens group G1 based on the d line is ν1pave, it is preferable that the zoom lens satisfies Conditional Expression (6). By not allowing the corresponding value of Conditional Expression (6) to be equal to or less than the lower limit, there is an advantage in suppressing longitudinal chromatic aberration. By not allowing the corresponding value of Conditional Expression (6) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (6-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (6-2).

81.7<ν1pave<105   (6)

83<ν1pave<103   (6-1)

89<ν1pave<101   (6-2)

Assuming that an Abbe number of the positive lens of the first lens group G1 based on the d line is ν1p and a partial dispersion ratio thereof between a g line and an F line is θ1p,

in a case where Δθ1p=θ1p+0.00162×ν1p−0.64159, it is preferable that the zoom lens includes at least one positive lens satisfying Conditional Expression (7). Δθ1p is an amount that indicates anomalous dispersibility. By not allowing the corresponding value of Conditional Expression (7) to be equal to or less than the lower limit, there is an advantage in suppressing secondary longitudinal chromatic aberration. By not allowing the corresponding value of Conditional Expression (7) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that at least one positive lens satisfying Conditional Expression (7) satisfies Conditional Expression (7-1), and it is yet more preferable that the lens satisfies Conditional Expression (7-2).

0.03<Δθ1p<0.06   (7)

0.032<Δθ1p<0.058   (7-1)

0.038<Δθ1p<0.056   (7-2)

Assuming that refractive indexes for the g line, F line, and C line of a certain lens are Ng, NF, and NC, respectively, and the partial dispersion ratios thereof between the g line and F line of the lens is θg,F, θg,F is defined by the following expression.

θg,F=(Ng−NF)/(NF−NC)

Further, the “d line”, “C line”, “F line”, and “g line” described in the present specification are emission lines. The wavelength of the d line is 587.56 nm (nanometers), the wavelength of the C line is 656.27 nm (nanometers), the wavelength of the F line is 486.13 nm (nanometers), and the wavelength of the g line is 435.84 nm (nanometers).

Assuming that an average value of Δθ1p of all the positive lenses of the first lens group G1 is Δθ1pave, it is preferable that the zoom lens satisfies Conditional Expression (8). By not allowing the corresponding value of Conditional Expression (8) to be equal to or less than the lower limit, there is an advantage in suppressing secondary longitudinal chromatic aberration. By not allowing the corresponding value of Conditional Expression (8) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (8-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (8-2).

0.03<Δθ1pave<0.06   (8)

0.032<Δθ1pave<0.058   (8-1)

0.038<Δθ1pave<0.056   (8-2)

Assuming that an Abbe number of the positive lens disposed in the lens group that has the strongest refractive power among the lens groups that have positive refractive powers and that are included in the middle group GM based on the d line is νMp, it is preferable that the zoom lens includes at least one positive lens satisfying Conditional Expression (9). By not allowing the corresponding value of Conditional Expression (9) to be equal to or less than the lower limit, there is an advantage in suppressing fluctuation in longitudinal chromatic aberration during zooming. By not allowing the corresponding value of Conditional Expression (9) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that at least one positive lens satisfying Conditional Expression (9) satisfies Conditional Expression (9-1), and it is yet more preferable that the lens satisfies Conditional Expression (9-2).

81.7<νMp<105   (9)

83<νMp<103   (9-1)

89<νMp<101   (9-2)

Assuming that an average value of the Abbe numbers of all the positive lenses disposed in the lens group that has the strongest refractive power among the lens groups having the positive refractive power and included in the middle group GM based on the d line is νMpave, it is preferable that the zoom lens satisfies Conditional Expression (10). By not allowing the corresponding value of Conditional Expression (10) to be equal to or less than the lower limit, there is an advantage in suppressing fluctuation in longitudinal chromatic aberration during zooming. By not allowing the corresponding value of Conditional Expression (10) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (10-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (10-2).

81.7<νMpave<105   (10)

83<νMpave<103   (10-1)

89<νMpave<101   (10-2)

Assuming that an Abbe number of the positive lens disposed in a lens group that has a strongest refractive power among the lens groups that have positive refractive powers and that are included in the middle group GM based on the d line is νMp and a partial dispersion ratio thereof between the g line and the F line is θMp,

in a case where ΔθMp is represented by ΔθMp=θMp+0.00162×νMp−0.64159, it is preferable that the zoom lens includes at least one positive lens satisfying Conditional Expression (11). ΔθMp is an amount that indicates anomalous dispersibility. By not allowing the corresponding value of Conditional Expression (11) to be equal to or less than the lower limit, there is an advantage in suppressing fluctuation in longitudinal chromatic aberration during zooming. By not allowing the corresponding value of Conditional Expression (11) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that at least one positive lens satisfying Conditional Expression (11) satisfies Conditional Expression (11-1), and it is yet more preferable that the lens satisfies Conditional Expression (11-2).

0.014<ΔθMp<0.06   (11)

0.03<ΔθMp<0.058   (11-1)

0.032<ΔθMp<0.056   (11-2)

Assuming that an average value of ΔθMp of all the positive lenses of the lens group that has the strongest refractive power among the lens groups that have positive refractive powers and that are included in the middle group GM is ΔθMpave, it is preferable that the zoom lens satisfies Conditional Expression (12). By not allowing the corresponding value of Conditional Expression (12) to be equal to or less than the lower limit, there is an advantage in suppressing fluctuation in longitudinal chromatic aberration during zooming. By not allowing the corresponding value of Conditional Expression (12) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (12-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (12-2).

0.014<ΔθMpave<0.06   (12)

0.03<ΔθMpave<0.058   (12-1)

0.032<ΔθMpave<0.056   (12-2)

In a configuration in which the first lens group G1 includes at least one negative lens, assuming that a refractive index of the negative lens of the first lens group G1 at the d line is N1n, it is preferable that the zoom lens includes at least one negative lens satisfying Conditional Expression (13). By not allowing the corresponding value of Conditional Expression (13) to be equal to or less than the lower limit, there is an advantage in achieving reduction in weight. By not allowing the corresponding value of Conditional Expression (13) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that at least one negative lens satisfying Conditional Expression (13) satisfies Conditional Expression (13-1), and it is yet more preferable that the lens satisfies Conditional Expression (13-2).

1.55<N1n<1.8   (13)

1.57<N1n<1.79   (13-1)

1.58<N1n<1.77   (13-2)

In a configuration in which the second lens group G2 includes at least one positive lens, assuming that an Abbe number of the positive lens of the second lens group G2 based on the d line is ν2p, it is preferable that the zoom lens includes at least one positive lens satisfying Conditional Expression (14). By not allowing the corresponding value of Conditional Expression (14) to be equal to or less than the lower limit, the availability of the material is improved, and a material that is easier to manufacture can be used. By not allowing the corresponding value of Conditional Expression (14) to be equal to or greater than the upper limit, there is an advantage in suppressing longitudinal chromatic aberration. In order to obtain more favorable characteristics, it is more preferable that at least one positive lens satisfying Conditional Expression (14) satisfies Conditional Expression (14-1), and it is yet more preferable that the lens satisfies Conditional Expression (14-2).

15<ν2p<25   (14)

16<ν2p<23   (14-1)

17<ν2p<22   (14-2)

In a configuration in which the second lens group G2 includes at least one positive lens, assuming that an Abbe number of the positive lens of the second lens group G2 based on the d line is ν2p and a partial dispersion ratio thereof between the g line and the F line is θ2p,

in a case where Δθ2p is represented by Δθ2p=θ2p+0.00162×ν2p−0.64159, it is preferable that the zoom lens includes at least one positive lens satisfying Conditional Expression (15). Δθ2p is an amount that indicates anomalous dispersibility. By not allowing the corresponding value of Conditional Expression (15) to be equal to or less than the lower limit, there is an advantage in suppressing secondary longitudinal chromatic aberration. By not allowing the corresponding value of Conditional Expression (15) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that at least one positive lens satisfying Conditional Expression (15) satisfies Conditional Expression (15-1), and it is yet more preferable that the lens satisfies Conditional Expression (15-2).

0.015<Δθ2p<0.06   (15)

0.03<Δθ2p<0.055   (15-1)

0.035<Δθ2p<0.053   (15-2)

Assuming that an Abbe number of the negative lens of the second lens group G2 based on the d line is ν2n, it is preferable that the zoom lens includes at least one negative lens satisfying Conditional Expression (16). By not allowing the corresponding value of Conditional Expression (16) to be equal to or less than the lower limit, there is an advantage in suppressing lateral chromatic aberration. By not allowing the corresponding value of Conditional Expression (16) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that at least one negative lens satisfying Conditional Expression (16) satisfies Conditional Expression (16-1), and it is yet more preferable that the lens satisfies Conditional Expression (16-2).

70<ν2n<105   (16)

81.7<ν2n<103   (16-1)

82.4<ν2n<101   (16-2)

Assuming that an Abbe number of a negative lens of the second lens group G2 based on the d line is ν2n and a partial dispersion ratio thereof between the g line and the F line is θ2n,

in a case where θ2n is represented by Δθ2n=θ2n+0.00162×ν2n−0.64159, it is preferable that the zoom lens includes at least one negative lens satisfying Conditional Expression (17). Δθ2n is an amount that indicates anomalous dispersibility. By not allowing the corresponding value of Conditional Expression (17) to be equal to or less than the lower limit, there is an advantage in suppressing second-order lateral chromatic aberration. By not allowing the corresponding value of Conditional Expression (17) to be equal to or greater than the upper limit, the availability of the material is increased, and a material that is easier to manufacture can be used. In order to obtain more favorable characteristics, it is more preferable that at least one negative lens satisfying Conditional Expression (17) satisfies Conditional Expression (17-1), and it is yet more preferable that the lens satisfies Conditional Expression (17-2).

0.03<Δθ2n<0.06   (17)

0.032<Δθ2n<0.058   (17-1)

0.035<Δθ2n<0.05   (17-2)

Assuming that a lateral magnification of the final lens group GE in a state in which the infinite distance object is in focus at the telephoto end is βEt, it is preferable that the zoom lens satisfies Conditional Expression (18). By not allowing the corresponding value of Conditional Expression (18) to be equal to or less than the lower limit, there is an advantage in achieving reduction in size. By not allowing the corresponding value of Conditional Expression (18) to be equal to or greater than the upper limit, there is an advantage in suppressing field curvature. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (18-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (18-2).

1.4<βEt<4.7   (18)

1.7<βEt<4   (18-1)

2.1<βEt<3.6   (18-2)

Assuming that a focal length of the lens group that has the strongest refractive power among the lens groups that have positive refractive powers and that are included in the middle group GM is fMp, it is preferable that the zoom lens satisfies Conditional Expression (19). Here, it is assumed that a focal length of the whole system in a state in which the infinite distance object is in focus at the wide angle end is fw, and a focal length of the whole system in a state in which the infinite distance object is in focus at the telephoto end is ft. By not allowing the corresponding value of Conditional Expression (19) to be equal to or less than the lower limit, there is an advantage in suppressing spherical aberration. By not allowing the corresponding value of Conditional Expression (19) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in size. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (19-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (19-2).

0.1<fMp/(fw×ft)^1/2<0.7   (19)

0.14<fMp/(fw×ft)^1/2<0.5   (19-1)

0.24<fMp/(fw×ft)^1/2<0.42   (19-2)

Assuming that a lateral magnification of the second lens group G2 in a state in which the infinite distance object is in focus at the telephoto end is β2t, it is preferable that the zoom lens satisfies Conditional Expression (20). By not allowing the corresponding value of Conditional Expression (20) to be equal to or less than the lower limit, there is an advantage in achieving an increase in zoom ratio. By not allowing the corresponding value of Conditional Expression (20) to be equal to or greater than the upper limit, there is an advantage in suppressing fluctuation in aberrations during zooming. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (20-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (20-2).

0.9<|β2t|<4.6   (20)

1.3<|β2t|<4.1   (20-1)

2.1<|β2t|<3.9   (20-2)

In a case where the zoom lens includes a vibration-proof group that moves in a direction intersecting with the optical axis Z during image blur correction, it is preferable that the zoom lens further includes a stationary group Gk disposed adjacent to the vibration-proof group on the image side of the vibration-proof group. It is preferable that the stationary group Gk has a refractive power opposite to that of the vibration-proof group and remains stationary with respect to the image plane Sim during zooming and focusing. In such a configuration, assuming that a focal length of the vibration-proof group is fis and a focal length of the stationary group Gk is fisr, it is preferable that the zoom lens satisfies Conditional Expression (21). By not allowing the corresponding value of Conditional Expression (21) to be equal to or less than the lower limit, there is an advantage in suppressing fluctuation in aberrations during image blur correction. By not allowing the corresponding value of Conditional Expression (21) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in weight of the vibration-proof group. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (21-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (21-2).

0.32<|fis/fis|<1.1   (21)

0.37<|fis/fis|<0.9   (21-1)

0.41<|fis/fis|<0.8   (21-2)

For example, the zoom lens of FIG. 1 includes a stationary group Gk consisting of a lens L58 to a lens L62. That is, the stationary group Gk in FIG. 1 consists of all lenses closer to the image side than the vibration-proof group. However, the stationary group Gk of the present disclosure is not limited to the configuration. In the technique of the present disclosure, the stationary group Gk may be configured to consist of at least one lens, and at least one lens may be disposed closer to the image side than the stationary group Gk.

In a configuration in which the first lens group G1 includes at least one negative lens, assuming that a center thickness of the negative lens disposed closest to the object side among negative lenses included in the first lens group G1 is D1n and an F number in a state in which the infinite distance object is in focus at the telephoto end is FNot, it is preferable that the zoom lens satisfies Conditional Expression (22). By not allowing the corresponding value of Conditional Expression (22) to be equal to or less than the lower limit, there is an advantage in increasing the mechanical strength of the negative lens disposed closest to the object side. By not allowing the corresponding value of Conditional Expression (22) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in weight of the first lens group G1. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (22-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (22-2).

0.01<D1n/(ft/FNot)<0.04   (22)

0.014<D1n/(ft/FNot)<0.033   (22-1)

0.017<D1n/(ft/FNot)<0.03   (22-2)

Assuming that a focal length of the middle group GM in a state in which the infinite distance object is in focus at the wide angle end is fMw and a focal length of the middle group GM in a state in which the infinite distance object is in focus at the telephoto end is fMt, it is preferable that the zoom lens satisfies Conditional Expression (23). By not allowing the corresponding value of Conditional Expression (23) to be equal to or less than the lower limit, there is an advantage in suppressing spherical aberration. By not allowing the corresponding value of Conditional Expression (23) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in size. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (23-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (23-2).

0.16<(fMw×fMt)^1/2/(fw×ft)^1/2<0.3   (23)

0.18<(fMw×fMt)^1/2/(fw×ft)^1/2<0.27   (23-1)

0.19<(fMw×fMt)^1/2/(fw×ft)^1/2<0.25   (23-2)

Assuming that a focal length of the PA lens group GPA is WA and a focal length of the second lens group G2 is f2, it is preferable that the zoom lens satisfies Conditional Expression (24). By not allowing the corresponding value of Conditional Expression (24) to be equal to or less than the lower limit, there is an advantage in achieving reduction in size. By not allowing the corresponding value of Conditional Expression (24) to be equal to or greater than the upper limit, there is an advantage in achieving an increase in zoom ratio. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (24-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (24-2).

0.25<|f2|/fPA<3   (24)

0.35<|f2|/fPA<1.5   (24-1)

0.45<|f2|/fPA<0.83   (24-2)

Assuming that a sum of a back focal length of the whole system at an air-equivalent distance and a distance on an optical axis from a lens surface closest to the object side in the first lens group G1 to a lens surface closest to the image side in the final lens group GE in a state in which the infinite distance object is in focus at the telephoto end is TLt, it is preferable that the zoom lens satisfies Conditional Expression (25). By not allowing the corresponding value of Conditional Expression (25) to be equal to or less than the lower limit, there is an advantage in suppressing longitudinal chromatic aberration. By not allowing the corresponding value of Conditional Expression (25) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in size. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (25-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (25-2).

0.42<TLt/ft<0.94   (25)

0.48<TLt/ft<0.78   (25-1)

0.5<TLt/ft<0.65   (25-2)

Assuming that a focal length of the final lens group GE is fE, it is preferable that the zoom lens satisfies Conditional Expression (26). By not allowing the corresponding value of Conditional Expression (26) to be equal to or less than the lower limit, sensitivity to error of the final lens group GE can be suppressed. By not allowing the corresponding value of Conditional Expression (26) to be equal to or greater than the upper limit, there is an advantage in suppressing various aberrations at the telephoto end. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (26-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (26-2).

0.02<|fE|/ft<0.2   (26)

0.03<|fE|/ft<0.14   (26-1)

0.04<|fE|/ft<0.1   (26-2)

Assuming that a lateral magnification of the second lens group G2 in a state in which the infinite distance object is in focus at the telephoto end is β2t and a lateral magnification of the second lens group G2 in a state in which the infinite distance object is in focus at the wide angle end is β2w, it is preferable that the zoom lens satisfies Conditional Expression (27). By not allowing the corresponding value of Conditional Expression (27) to be equal to or less than the lower limit, there is an advantage in achieving an increase in zoom ratio. By not allowing the corresponding value of Conditional Expression (27) to be equal to or greater than the upper limit, there is an advantage in suppressing fluctuation in aberrations during zooming. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (27-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (27-2).

2.5<β2t/β2w<7.9   (27)

2.7β2t/β2w<7   (27-1)

2.9β2t/β2w<6.6   (27-2)

Assuming that a combined lateral magnification of all the lenses closer to the image side than the PA lens group GPA in a state in which the infinite distance object is in focus at the telephoto end is βPArt it is preferable that the zoom lens satisfies Conditional Expression (28). By not allowing the corresponding value of Conditional Expression (28) to be equal to or less than the lower limit, there is an advantage in achieving reduction in size. By not allowing the corresponding value of Conditional Expression (28) to be equal to or greater than the upper limit, there is an advantage in suppressing spherical aberration. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (28-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (28-2).

0.8<βPArt<4.5   (28)

1<βPArt<4   (28-1)

1.12<βPArt<3.65   (28-2)

Assuming that a focal length of the first lens group G1 is f1, it is preferable that the zoom lens satisfies Conditional Expression (29). By not allowing the corresponding value of Conditional Expression (29) to be equal to or less than the lower limit, there is an advantage in suppressing spherical aberration. By not allowing the corresponding value of Conditional Expression (29) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in size. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (29-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (29-2).

0.43<f1/(fw×ft)^1/2<1.03   (29)

0.52<f1/(fw×ft)^1/2<0.91   (29-1)

0.58<f1/(fw×ft)^1/2<0.83   (29-2)

Assuming that a focal length of the second lens group G2 is f2, it is preferable that the zoom lens satisfies Conditional Expression (30). By not allowing the corresponding value of Conditional Expression (30) to be equal to or less than the lower limit, there is an advantage in suppressing field curvature. By not allowing the corresponding value of Conditional Expression (30) to be equal to or greater than the upper limit, there is an advantage in achieving an increase in zoom ratio. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (30-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (30-2).

0.23<|f2|/fw<0.66   (30)

0.28<|f2|/fw<0.58   (30-1)

0.318<|f2|/fw<0.531   (30-2)

In a case where the zoom lens includes at least one focusing group that moves along the optical axis Z during focusing, the at least one focusing group may be configured to consist of one negative lens and one positive lens. Assuming that a focal length of the positive lens of the focusing group consisting of one negative lens and one positive lens is ffp, and a focal length of the negative lens of the focusing group consisting of one negative lens and one positive lens is ffn, it is preferable that the zoom lens satisfies Conditional Expression (31). By not allowing the corresponding value of Conditional Expression (31) to be equal to or less than the lower limit, there is an advantage in suppressing the amount of movement of the focusing group during focusing. By not allowing the corresponding value of Conditional Expression (31) to be equal to or greater than the upper limit, there is an advantage in suppressing fluctuation in aberrations during focusing. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (31-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (31-2).

0.9<ffp/|ffn|<2.8   (31)

1.1<ffp/|ffn|<2.5   (31-1)

1.2<ffp/|ffn|<2.3   (31-2)

Assuming that a focal length of the first lens group G1 is f1, and a focal length of the second lens group G2 is f2, it is preferable that the zoom lens satisfies Conditional Expression (32). By not allowing the corresponding value of Conditional Expression (32) to be equal to or less than the lower limit, there is an advantage in achieving an increase in zoom ratio. By not allowing the corresponding value of Conditional Expression (32) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in size. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (32-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (32-2).

2.1<f1/|f2|<4.8   (32)

2.6<f1/|f2|<4.3   (32-1)

2.9<f1/|f2|<3.9   (32-2)

It is preferable that the zoom lens satisfies Conditional Expression (33). By not allowing the corresponding value of Conditional Expression (33) to be equal to or less than the lower limit, there is an advantage in suppressing fluctuation in aberrations during zooming. By not allowing the corresponding value of Conditional Expression (33) to be equal to or greater than the upper limit, there is an advantage in achieving an increase in zoom ratio. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (33-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (33-2).

0.13<|f2|/(fw×ft)^1/2<0.32   (33)

0.15<|f2|/(fw×ft)^1/2<0.28   (33-1)

0.17<|f2|/(fw×ft)^1/2<0.26   (33-2)

It is preferable that the zoom lens satisfies Conditional Expression (34). By not allowing the corresponding value of Conditional Expression (34) to be equal to or less than the lower limit, there is an advantage in suppressing spherical aberration. By not allowing the corresponding value of Conditional Expression (34) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in size. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (34-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (34-2).

0.12<fPA/(fw×ft)^1/2<0.45   (34)

0.15<fPA/(fw×ft)^1/2<0.4   (34-1)

0.17<fPA/(fw×ft)^1/2<0.36   (34-2)

Assuming that a focal length of the final lens group GE is fE, it is preferable that the zoom lens satisfies Conditional Expression (35). By not allowing the corresponding value of Conditional Expression (35) to be equal to or less than the lower limit, sensitivity to error of the final lens group GE can be suppressed. By not allowing the corresponding value of Conditional Expression (35) to be equal to or greater than the upper limit, there is an advantage in suppressing various aberrations in the entire zoom range. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (35-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (35-2).

0.06<|fE|/(fw×ft)^1/2<0.25   (35)

0.07<|fE|/(fw×ft)^1/2<0.22   (35-1)

0.08<|fE|/(fw×ft)^1/2<0.2   (35-2)

Assuming that a focal length of the focusing group is ff, it is preferable that the zoom lens includes at least one focusing group satisfying Conditional Expression (36). By not allowing the corresponding value of Conditional Expression (36) to be equal to or less than the lower limit, there is an advantage in suppressing fluctuation in aberrations during focusing. By not allowing the corresponding value of Conditional Expression (36) to be equal to or greater than the upper limit, there is an advantage in suppressing the amount of movement of the focusing group during focusing. In order to obtain more favorable characteristics, it is more preferable that at least one focusing group satisfying Conditional Expression (36) satisfies Conditional Expression (36-1), and it is yet more preferable that the focusing group satisfies Conditional Expression (36-2).

0.14<|ff|/(fw×ft)^1/2<0.7   (36)

0.17<|ff|/(fw×ft)^1/2<0.62   (36-1)

0.19<|ff|/(fw×ft)^1/2<0.56   (36-2)

Assuming that a focal length of the vibration-proof group is fis, it is preferable that the zoom lens satisfies Conditional Expression (37). By not allowing the corresponding value of Conditional Expression (37) to be equal to or less than the lower limit, there is an advantage in suppressing fluctuation in aberrations during image blur correction. By not allowing the corresponding value of Conditional Expression (37) to be equal to or greater than the upper limit, there is an advantage in suppressing the amount of movement of the vibration-proof group during image blur correction. In order to obtain more favorable characteristics, it is more preferable that the zoom lens satisfies Conditional Expression (37-1), and it is yet more preferable that the zoom lens satisfies Conditional Expression (37-2).

0.05<|fis|/(fw×ft)^1/2<0.15   (37)

0.06<|fis|/(fw×ft)^1/2<0.14   (37-1)

0.063<|fis|/(fw×ft)^1/2<0.124   (37-2)

The middle group GM may be configured to include a lens pair consisting of a negative lens and a positive lens that are adjacent to each other with an air spacing interposed therebetween. In the configuration in which the middle group GM includes the above-mentioned lens pair, it is preferable that the zoom lens includes at least one lens pair satisfying Conditional Expression (38). Here, it is assumed that a spacing on the optical axis of the air spacing in the lens pair of the middle group GM is DMnp. It is assumed that a curvature radius of an object side surface of an air lens formed by the air spacing in the lens pair of the middle group GM is RMnpf. It is assumed that a curvature radius of an image side surface of the air lens formed by the air spacing in the lens pair of the middle group GM is RMnpr. By not allowing the corresponding value of Conditional Expression (38) to be equal to or less than the lower limit, there is an advantage in suppressing spherical aberration. By not allowing the corresponding value of Conditional Expression (38) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in size. In order to obtain more favorable characteristics, it is more preferable that at least one lens pair satisfying Conditional Expression (38) satisfies Conditional Expression (38-1), and it is yet more preferable that the lens pair satisfies Conditional Expression (38-2).

0.002<DMnp/(RMnpf+RMnpr)<0.1   (38)

0.005<DMnp/(RMnpf+RMnpr)<0.04   (38-1)

0.01<DMnp/(RMnpf+RMnpr)<0.027   (38-2)

It is preferable that the final lens group GE includes a lens pair consisting of a negative lens and a positive lens that are adjacent to each other with an air spacing interposed therebetween. In a configuration in which the final lens group GE includes the above-mentioned lens pair, it is preferable that the zoom lens includes at least one lens pair satisfying Conditional Expression (39). Here, it is assumed that a spacing on the optical axis of the air spacing in the lens pair of the final lens group GE is DEnp. It is assumed that a curvature radius of an object side surface of an air lens formed by the air spacing in the lens pair of the final lens group GE is REnpf. It is assumed that a curvature radius of an image side surface of the air lens formed by the air spacing in the lens pair of the final lens group GE is REnpr. By not allowing the corresponding value of Conditional Expression (39) to be equal to or less than the lower limit, there is an advantage in suppressing field curvature. By not allowing the corresponding value of Conditional Expression (39) to be equal to or greater than the upper limit, there is an advantage in achieving reduction in size. In order to obtain more favorable characteristics, it is more preferable that at least one lens pair satisfying Conditional Expression (39) satisfies Conditional Expression (39-1), and it is yet more preferable that the lens satisfies Conditional Expression (39-2).

−0.5<DEnp/(REnpf+REnpr)<−0.01   (39)

−0.35<DEnp/(REnpf+REnpr)<−0.04   (39-1)

−0.23<DEnp/(REnpf+REnpr)<−0.07   (39-2)

In the present specification, in the “lens pair consisting of a negative lens and a positive lens which are adjacent to each other with an air spacing interposed therebetween”, the negative lens, the air spacing, and the positive lens may be arranged, in order from the object side to the image side, or the positive lens, the air spacing, and the negative lens may be arranged, in order from the object side to the image side. The “air lens” means that the air spacing interposed between two opposing lens surfaces is regarded as a lens having a refractive index of 1. For example, in the case of the lens pair in which the negative lens, the air spacing, and the positive lens are arranged in order from the object side to the image side, the “object side surface of the air lens” corresponds to a lens surface of the negative lens of the lens pair on the image side, and the “image side surface of the air lens” corresponds to a lens surface of the positive lens of the lens pair on the object side.

The example shown in FIG. 1 is an example, and various modifications can be made without departing from the scope of the technique of the present disclosure. For example, the number of lens groups included in the middle group GM is two in the example of FIG. 1, but may be different from the example of FIG. 1, and may be, for example, one or three. The number of lenses included in each lens group may be different from the number shown in FIG. 1. For example, each group can be configured as follows.

A single lens that has a negative refractive power may be disposed closest to the object side in the first lens group G1. In such a case, there is an advantage in correcting spherical aberration.

The first lens group G1 may be configured to include a negative lens, a positive lens, and a positive lens, in order from the object side to the image side. In such a case, there is an advantage in achieving an increase in zoom ratio while satisfactorily maintaining various aberrations. More preferably, the first lens group G1 includes a negative lens, a positive lens, and a positive lens, in order from the position closest to the object side to the image side.

The first lens group G1 may be configured to consist of a negative lens, a positive lens, and a positive lens, in order from the object side to the image side. In such a case, there is an advantage in achieving an increase in zoom ratio while satisfactorily maintaining various aberrations and achieving reduction in weight.

The first lens group G1 may be configured to consist of a negative lens and a positive lens, in order from the object side to the image side. Alternatively, the first lens group G1 may be configured to consist of a negative lens, a positive lens, a positive lens, and a positive lens, in order from the object side to the image side.

In a case where the first lens group G1 includes a negative lens and a positive lens which is disposed adjacent to the image side of the negative lens, the negative lens and the positive lens may be cemented or do not have to be cemented.

The second lens group G2 may be configured to include a negative lens, a negative lens, and a positive lens, in order from the object side to the image side. In such a case, there is an advantage in achieving an increase in zoom ratio while satisfactorily maintaining various aberrations. Further, in a case where the second lens group G2 is configured to consist of a negative lens, a negative lens, and a positive lens in order from the object side to the image side, in addition to the above-mentioned effect, there is an advantage in achieving reduction in size.

The middle group GM may be configured to consist of two lens groups that have positive refractive powers. In such a case, the lens group that has a positive refractive power on the object side in the middle group GM may be configured to consist of a positive lens, a positive lens, a positive lens, and a negative lens, in order from the object side to the image side, and the lens group that has a positive refractive power on the image side in the middle group GM may be configured to consist of a negative lens and a positive lens, in order from the object side to the image side.

The middle group GM may be configured to consist of one lens group that has a positive refractive power. In such a case, the lens group that has a positive refractive power and that constitutes the middle group GM may be configured to consist of four positive lenses and two negative lenses.

The middle group GM may be configured to consist of a lens group that has a positive refractive power and a lens group that has a negative refractive power, in order from the object side to the image side. In such a case, the lens group that has a positive refractive power in the middle group GM may be configured to consist of a positive lens, a positive lens, a positive lens, and a negative lens in order from the object side to the image side, and the lens group that has a negative refractive power in the middle group GM may be configured to consist of a negative lens and a positive lens.

The middle group GM may be configured to consist of a lens group having three positive refractive powers. In such a case, the lens group that has a positive refractive power at a position closest to the object side in the middle group GM may be configured to consist of two positive lenses. The lens group that has a positive refractive power and that is second from the object side in the middle group GM may be configured to consist of a positive lens and a negative lens in order from the object side to the image side. The lens group that has a positive refractive power at a position closest to the image side in the middle group GM may be configured to consist of a negative lens and a positive lens, in order from the object side to the image side.

The middle group GM may be configured to consist of a lens group that has a positive refractive power, a lens group that has a negative refractive power, and a lens group that has a positive refractive power, in order from the object side to the image side. In such a case, the lens group that has a positive refractive power on the object side in the middle group GM may be configured to consist of two positive lenses. The lens group that has a negative refractive power in the middle group GM may be configured to consist of a positive lens and a negative lens, in order from the object side to the image side. The lens group that has a positive refractive power on the image side in the middle group GM may be configured to consist of a negative lens and a positive lens, in order from the object side to the image side.

The aperture stop St may be configured to be disposed closest to the object side in the final lens group GE. In such a case, there is an advantage in achieving reduction in size of the final lens group GE.

The focusing group may be disposed adjacent to the aperture stop St. In such a case, there is an advantage in achieving reduction in size of the focusing group. The focusing group may be disposed adjacent to the object side of the aperture stop St, or may be disposed adjacent to the image side of the aperture stop St.

The focusing group may be disposed closest to the image side in the middle group GM. The focusing group may be configured to consist of the lens component closest to the object side in the final lens group GE, or may be configured to consist of the lens component which is second from the object side in the final lens group GE. It should be noted that one lens component means one cemented lens or one single lens.

In a case where the zoom lens contains two focusing groups, the signs of the refractive powers of these two focusing groups may be configured to be different from each other. In such a case, there is an advantage in suppressing fluctuation in aberrations during focusing.

The vibration-proof group may be configured to consist of one positive lens and two negative lenses. In such a case, there is an advantage in suppressing fluctuation in aberrations during image blur correction. More preferably, the vibration-proof group consists of one positive lens and two negative lenses, in order from the object side to the image side.

The above-mentioned preferred configurations and available configurations may be optional combinations, and it is preferable to selectively adopt the configurations in accordance with required specification. It should be noted that conditional expressions that the zoom lens of the present disclosure preferably satisfies are not limited to conditional expressions described in the form of expressions, and the lower limit and the upper limit are selected from the preferable, more preferable, and yet more preferable conditional expressions. Conditional Expressions may include all conditional expressions obtained through optional combinations.

For example, one preferred embodiment of the zoom lens of the present disclosure consists of, in order from the object side to the image side, a first lens group G1 that has a positive refractive power, a second lens group G2 that has a negative refractive power, a middle group GM that includes the above-mentioned lens groups, and a final lens group GE. The middle group GM has a positive refractive power as a whole throughout the entire zoom range. During zooming, the spacing between the first lens group G1 and the second lens group G2 changes, the spacing between the second lens group G2 and the middle group GM changes, and the spacing between the middle group GM and the final lens group GE changes. In a case where the middle group GM includes a plurality of lens groups, all the spacings of adjacent lens groups in the middle group GM change during zooming. Then, Conditional Expression (1) is satisfied.

Next, examples of the zoom lens of the present disclosure will be described with reference to the drawings. The reference numerals attached to the lenses in the cross-sectional views of each example are used independently for each example in order to avoid complication of description and drawings due to an increase in the number of digits of the reference numerals. Therefore, even in a case where common reference numerals are attached in the drawings of different examples, components do not necessarily have a common configuration.

EXAMPLE 1

FIG. 1 shows a configuration and movement loci of a zoom lens of Example 1, and an illustration method and a configuration thereof are as described above. Therefore, some description is not repeated herein. The zoom lens of Example 1 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 1, Tables 1A and 1B show basic lens data, and Table 2 shows specifications and variable surface spacings. The table of basic lens data is divided into two tables including Table 1A and Table 1B in order to avoid lengthening of one table. Table 1A shows groups from the first lens group G1 to the middle group GM, and Table 1B shows the final lens group GE and the optical member PP.

The table of basic lens data will be described as follows. The group number column shows the numbers of the corresponding lens groups, and shows the signs of the refractive powers of the respective lens groups in parentheses. For example, the term “1 (positive)” in the group number column corresponds to the first lens group G1 and indicates that the first lens group G1 has a positive refractive power. The surface number column shows surface numbers in a case where the surface closest to the object side is the first surface and the number is increased one by one toward the image side. The curvature radius column shows curvature radii of the respective surfaces. The surface spacing column shows surface spacings between each surface and the surface adjacent to the image side on the optical axis. The Nd column shows a refractive index of each component at the d line. The vd column shows an Abbe number of each component based on the d line. The θg,F column shows a partial dispersion ratio of each component between the g line and the F line. In the rightmost column, the surfaces corresponding to the focusing group and the vibration-proof group are separated and shown in parentheses, and the sign of the refractive power of each group is shown.

In the table of basic lens data, the sign of the curvature radius of the convex surface facing toward the object side is positive, and the sign of the curvature radius of the convex surface facing toward the image side is negative. In a cell of a surface number of a surface corresponding to the aperture stop St, the surface number and a term of (St) are noted. A value at the bottom cell of the surface spacing column in the table indicates a spacing between the image plane Sim and the surface closest to the image side in the table. The symbol DD[ ] is used for each variable surface spacing during zooming, and the object side surface number of the spacing is given in [ ] and is noted in the surfacing spacing column.

Table 2 shows a zoom magnification Zr, a focal length f, an F number FNo., a maximum total angle of view 2ω, and the variable surface spacing, based on the d line. The zoom magnification Zr is a zoom ratio. [°] in the cell of 2ω indicates that the unit thereof is degrees. Table 2 shows four types of states in which two types of zooming states and two types of imaging distances are combined. That is, Table 2 shows, in order from the left, the following states: a wide angle end state in which the imaging distance is infinite; a telephoto end state in which the imaging distance is infinite; a wide angle end state in which the imaging distance is 2.4 m (meters); and a telephoto end state in which the imaging distance is 2.4 m (meters). However, the zoom magnification and the focal length are shown only in a case where the imaging distance is infinite. The imaging distance is a distance from the image plane Sim.

In the data of each table, degrees are used as a unit of an angle, and millimeters (mm) are used as a unit of a length other than the imaging distance, but appropriate different units may be used since the optical system can be used even in a case where the system is enlarged or reduced in proportion. Further, each of the following tables shows numerical values rounded off to predetermined decimal places.

TABLE 1A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	νd	θg, F
1 (Positive)	1	219.92339	1.800	1.62005	36.35	0.58602
	2	106.03107	0.173
	3	107.10239	8.084	1.43700	95.10	0.53364
	4	−1680.72811	0.200
	5	104.53654	7.587	1.43700	95.10	0.53364
	6	∞	DD[6]
2 (Negative)	7	−189.34115	2.156	1.69680	55.53	0.54404
	8	64.65608	3.911
	9	−72.79432	1.424	1.43700	95.10	0.53364
	10	77.59181	3.220	1.85896	22.73	0.62844
	11	259.94009	DD[11]
3 (Positive)	12	∞	4.886	1.49700	81.54	0.53748
	13	−77.53366	0.394
	14	123.85155	3.510	1.49700	81.54	0.53748
	15	∞	0.100
	16	83.54384	7.171	1.43700	95.10	0.53364
	17	−112.04376	1.836	1.91082	35.25	0.58224
	18	∞	DD[18]
4 (Positive)	19	57.39355	1.224	1.78590	44.20	0.56317
	20	34.62265	1.500
	21	34.60758	8.297	1.49700	81.54	0.53748
	22	−244.56997	DD[22]

TABLE 1B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	νd	θg, F
5 (Negative)	23(St)	∞	DD[23]
	24	−279.12302	3.447	1.73800	32.33	0.59005	Focusing group
	25	−37.04456	1.148	1.69680	55.53	0.54404	(Negative)
	26	62.10900	DD[26]
	27	434.57118	3.680	1.54814	45.78	0.56859
	28	−22.53399	0.827	2.00069	25.46	0.61364
	29	−33.25735	2.500
	30	51.14499	3.011	1.80519	25.48	0.61354	Vibration-proof
	31	−51.14499	0.839	1.72915	54.64	0.54488	group
	32	26.55426	1.993				(Negative)
	33	−96.45008	0.666	1.81600	46.54	0.55532
	34	42.45805	2.614
	35	30.17232	4.692	1.67300	38.26	0.57580
	36	−22.16027	0.810	2.00069	25.46	0.61364
	37	33.82280	3.126	1.73800	32.33	0.59005
	38	−72.36949	1.252
	39	49.39686	4.043	1.60342	38.03	0.58356
	40	−29.15715	5.600
	41	−23.02408	0.657	1.62041	60.37	0.54240
	42	126.75141	53.922
	43	∞	2.850	1.51680	64.20	0.53430
	44	∞	1.000

TABLE 2
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	2.4 m
distance
Zoom	1.00	3.77
magnification
f	154.611	582.420
FNo.	5.76	8.19	5.85	9.48
2ω[°]	10.4	2.8	10.2	2.4
DD[6]	24.897	97.402	24.897	97.402
DD[11]	79.546	3.466	79.546	3.466
DD[18]	20.998	31.214	20.998	31.214
DD[22]	11.323	4.682	11.323	4.682
DD[23]	5.239	5.239	6.686	26.890
DD[26]	26.884	26.884	25.437	5.233

FIG. 4 shows a diagram of aberrations of the zoom lens of Example 1. In FIG. 4, in order from the left side, spherical aberration, astigmatism, distortion, and lateral chromatic aberration are shown. In FIG. 4, the top row labeled “wide angle end, imaging distance: infinity” shows aberrations in the wide angle end state in which the imaging distance is infinite. The second row labeled “telephoto end, imaging distance: infinity” shows aberrations in the telephoto end state in which the imaging distance is infinite. The third row labeled “wide angle end, imaging distance: 2.4 m” shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters). The bottom row labeled “telephoto end, imaging distance: 2.4 m” shows aberrations in the telephoto end state with the imaging distance of 2.4 m (meters). In the spherical aberration diagram, aberrations at the d line, the C line, the F line, and the g line are indicated by a solid line, a long broken line, a short broken line, and a chain line, respectively. In the astigmatism diagram, aberration in a sagittal direction at the d line is indicated by a solid line, and aberration in a tangential direction at the d line is indicated by a short broken line. In the distortion diagram, aberration at the d line is indicated by a solid line. In the lateral chromatic aberration diagram, aberrations at the C line, the F line, and the g line are respectively indicated by a long broken line, a short broken line, and a chain line. In the spherical aberration diagram, the value of the F number is shown after FNo.=. In other aberration diagrams, the value of the maximum half angle of view is shown after ω=.

Symbols, meanings, description methods, and illustration methods of the respective data pieces according to Example 1 are generally similar to those in the following examples unless otherwise specified. Therefore, in the following description, repeated description will not be given. In the cross-sectional view of the following examples, the PA lens group GPA and the stationary group Gk are not shown.

EXAMPLE 2

FIG. 5 shows a configuration and movement loci of the zoom lens of Example 2. The zoom lens of Example 2 consists of a first lens group G1, a second lens group G2, a third lens group G3, and a fourth lens group G4, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of six lenses L31 to L36, in order from the object side to the image side. The fourth lens group G4 consists of an aperture stop St and twelve lenses L41 to L52, in order from the object side to the image side.

During zooming, the first lens group G1 and the fourth lens group G4 remain stationary with respect to the image plane Sim, and the second lens group G2 and the third lens group G3 move along the optical axis Z by changing the spacing from the adjacent lens groups. The middle group GM consists of the third lens group G3. The final lens group GE consists of the fourth lens group G4. The focusing group has a negative refractive power and consists of lenses L41 and L42. The vibration-proof group has a negative refractive power and consists of lenses L45 to L47.

Regarding the zoom lens of Example 2, Tables 3A and 3B show basic lens data, and Table 4 shows specifications and variable surface spacings. FIG. 6 shows aberration diagrams. In FIG. 6, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 7.0 m (meters).

TABLE 3A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	νd	θg, F
1 (Positive)	1	267.53470	1.798	1.62005	36.35	0.58602
	2	119.05353	1.000
	3	119.82712	7.234	1.48563	85.19	0.53858
	4	−2365.52175	0.100
	5	205.25843	4.701	1.48563	85.19	0.53858
	6	−1734.33018	DD[6]
2 (Negative)	7	2669.26989	1.065	1.69680	55.53	0.54341
	8	94.96048	2.959
	9	−102.12467	1.526	1.48563	85.19	0.53858
	10	85.08299	2.022	1.92286	20.88	0.63900
	11	157.45815	DD[11]
3 (Positive)	12	403.82852	4.788	1.49700	81.61	0.53887
	13	−138.72000	0.100
	14	126.44658	4.457	1.49700	81.61	0.53887
	15	−1357.18415	0.100
	16	79.12120	7.585	1.48563	85.19	0.53858
	17	−150.38413	1.901	1.96413	31.07	0.59414
	18	752.80732	12.500
	19	91.89548	1.267	1.73167	54.83	0.54292
	20	45.59423	7.879	1.49700	81.61	0.53887
	21	−221.25846	DD[21]

TABLE 3B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	νd	θg, F
4 (Negative)	22(St)	∞	DD[22]
	23	−129.87507	3.577	1.73800	32.33	0.59005	Focusing group
	24	−33.06322	1.170	1.69680	55.53	0.54404	(Negative)
	25	97.50538	DD[25]
	26	−371.19310	3.324	1.54814	45.78	0.56859
	27	−23.98114	0.838	2.00069	25.46	0.61364
	28	−33.35730	5.742
	29	50.50377	2.848	1.80519	25.48	0.61354	Vibration-proof
	30	−63.72850	0.847	1.72915	54.64	0.54488	group
	31	29.55327	1.823				(Negative)
	32	−126.77320	0.682	1.81600	46.54	0.55532
	33	41.94644	2.000
	34	28.03045	5.129	1.67300	38.26	0.57580
	35	−21.38109	0.779	2.00069	25.46	0.61364
	36	46.23941	2.464	1.73800	32.33	0.59005
	37	−91.27596	3.878
	38	43.03775	3.539	1.58144	40.75	0.57757
	39	−32.29011	6.865
	40	−21.46995	0.599	1.62041	60.29	0.54266
	41	78.68602	53.766
	42	∞	2.850	1.51680	64.20	0.53430
	43	∞	1.000

TABLE 4
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	7.0 m
distance
Zoom	1.00	2.83
magnification
f	206.176	582.496
FNo.	5.78	8.25	5.89	8.69
2ω[°]	7.8	2.8	7.6	2.6
DD[6]	38.845	129.593	38.845	129.593
DD[11]	87.012	2.727	87.012	2.727
DD[21]	18.103	11.640	18.103	11.640
DD[22]	3.748	3.748	6.230	10.201
DD[25]	30.668	30.668	28.186	24.215

EXAMPLE 3

FIG. 7 shows a configuration and movement loci of the zoom lens of Example 3. The zoom lens of Example 3 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a positive refractive power and consists of the fourth lens group G4. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 3, Tables 5A and 5B show basic lens data, and Table 6 shows specifications and variable surface spacings. FIG. 8 shows aberration diagrams. In FIG. 8, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 7.0 m (meters).

TABLE 5A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	νd	θg, F
1 (Positive)	1	239.68561	2.022	1.62005	36.35	0.58602
	2	97.71521	1.000
	3	97.93859	8.497	1.49782	82.57	0.53862
	4	3190.43571	0.100
	5	124.17187	6.996	1.49782	82.57	0.53862
	6	−6005.50007	DD[6]
2 (Negative)	7	−403.99495	1.065	1.65100	56.24	0.54210
	8	62.79646	4.577
	9	−65.83933	1.065	1.49782	82.57	0.53862
	10	105.01234	0.290
	11	101.25520	2.191	1.89286	20.36	0.63944
	12	407.80057	DD[12]
3 (Positive)	13	654.41603	4.777	1.49700	81.54	0.53748
	14	−91.29180	3.874
	15	123.47041	4.105	1.49700	81.54	0.53748
	16	−420.23575	0.820
	17	69.15986	7.626	1.41390	100.82	0.53373
	18	−121.40919	1.899	1.89190	37.13	0.57813
	19	365.57038	DD[19]
4 (Positive)	20	50.59572	1.127	1.83481	42.74	0.56490	Focusing
	21	33.98951	1.714				group
	22	34.43547	7.769	1.49700	81.54	0.53748	(Positive)
	23	−297.78914	DD[23]

TABLE 5B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	νd	θg, F
5 (Positive)	24(St)	∞	3.535
	25	−565.82821	3.395	1.73800	32.33	0.59005
	26	−39.54911	1.131	1.69680	55.53	0.54404
	27	53.02269	4.626
	28	−142.08619	3.395	1.54072	47.23	0.56511
	29	−23.25629	0.861	2.00069	25.46	0.61364
	30	−32.46323	3.665
	31	179.11799	3.649	1.80519	25.48	0.61354	Vibration-proof
	32	−28.17442	0.931	1.72915	54.64	0.54488	group
	33	50.20961	1.424				(Negative)
	34	−175.65195	0.751	1.81600	46.54	0.55532
	35	43.29035	2.058
	36	25.30650	5.669	1.67300	38.26	0.57580
	37	−21.52284	0.801	2.00069	25.46	0.61364
	38	33.82121	2.986	1.73800	32.33	0.59005
	39	−61.44915	4.729
	40	50.74558	3.419	1.62004	36.26	0.58800
	41	−31.13747	6.124
	42	−20.76988	0.600	1.77250	49.60	0.55212
	43	124.34634	55.976
	44	∞	2.850	1.51680	64.20	0.53430
	45	∞	1.000

TABLE 6
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	7.0 m
distance
Zoom	1.00	3.77
magnification
f	154.651	583.093
FNo.	5.77	8.25	5.78	8.15
2ω[°]	10.4	2.8	10.2	2.6
DD[6]	29.414	102.475	29.414	102.475
DD[12]	81.669	2.331	81.669	2.331
DD[19]	20.831	33.855	19.329	26.832
DD[23]	13.867	7.120	15.369	14.143

EXAMPLE 4

FIG. 9 shows a configuration and movement loci of the zoom lens of Example 4. The zoom lens of Example 4 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 4, Tables 7A and 7B show basic lens data, and Table 8 shows specifications and variable surface spacings. FIG. 10 shows aberration diagrams. In FIG. 10, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 2.4 m (meters).

TABLE 7A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	νd	θg, F
1 (Positive)	1	190.29743	1.802	1.66715	35.27	0.58693
	2	119.04662	1.000
	3	120.08727	8.353	1.42537	97.75	0.53434
	4	−503.01147	0.100
	5	211.95080	3.842	1.42537	97.75	0.53434
	6	1425.19769	DD[6]
2 (Negative)	7	−2120.41580	1.067	1.69680	55.53	0.54341
	8	92.95453	3.079
	9	−96.39368	1.532	1.43700	95.10	0.53364
	10	86.50588	2.175	1.80809	22.76	0.63073
	11	189.93183	DD[11]
3 (Positive)	12	105.32247	5.463	1.55200	70.70	0.54219
	13	−458.55800	0.177
	14	78.74310	7.230	1.49700	81.54	0.53748
	15	−258.26434	0.100
	16	64.11641	8.523	1.42537	97.75	0.53434
	17	−156.31072	2.004	1.94645	33.35	0.58657
	18	579.02860	DD[18]
4 (Negative)	19	80.63363	1.130	1.82350	45.65	0.55644
	20	27.96823	8.042	1.57242	57.46	0.54893
	21	156.01684	DD[21]

TABLE 7B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	νd	θg, F
5 (Negative)	22(St)	∞	DD[22]
	23	−121.20397	2.991	1.73800	32.33	0.59005	Focusing group
	24	−41.73123	1.210	1.69680	55.53	0.54404	(Negative)
	25	90.27079	DD[25]
	26	−500.48801	3.618	1.54814	45.78	0.56859
	27	−30.62443	1.002	2.00069	25.46	0.61364
	28	−39.40937	11.727
	29	95.86716	2.766	1.80519	25.48	0.61354	Vibration-proof
	30	−45.22919	0.849	1.72915	54.64	0.54488	group
	31	42.36693	1.348				(Negative)
	32	−131.43380	0.684	1.81600	46.54	0.55532
	33	49.73081	4.226
	34	32.43273	4.047	1.67300	38.26	0.57580
	35	−29.15422	0.781	2.00069	25.46	0.61364
	36	39.69493	2.774	1.73800	32.33	0.59005
	37	−77.08721	7.573
	38	56.51114	3.235	1.58144	40.75	0.57757
	39	−34.93685	4.926
	40	−25.01023	0.602	1.62041	60.29	0.54266
	41	107.52290	59.174
	42	∞	2.850	1.51680	64.20	0.53430
	43	∞	1.000

TABLE 8
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	2.4 m
distance
Zoom	1.00	2.83
magnification
f	206.086	582.244
FNo.	5.75	8.24	5.93	9.98
2ω[°]	7.8	2.8	7.6	2.2
DD[6]	36.000	130.149	36.000	130.149
DD[11]	89.219	2.223	89.219	2.223
DD[18]	4.133	2.911	4.133	2.911
DD[21]	12.016	6.085	12.016	6.085
DD[22]	2.480	2.480	4.802	22.857
DD[25]	29.222	29.222	26.900	8.845

EXAMPLE 5

FIG. 11 shows a configuration and movement loci of the zoom lens of Example 5. The zoom lens in Example 5 consists of, in order from the object side to the image side, a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, a fifth lens group G5, and a sixth lens group G6. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of two lenses L31 and L32, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of two lenses L51 and L52, in order from the object side to the image side. The sixth lens group G6 consists of an aperture stop St and twelve lenses L61 to L72, in order from the object side to the image side.

During zooming, the first lens group G1 and the sixth lens group G6 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3, the fourth lens group G4, and the fifth lens group G5. The final lens group GE consists of the sixth lens group G6. The focusing group has a negative refractive power and consists of lenses L61 and L62. The vibration-proof group has a negative refractive power and consists of lenses L65 to L67.

Regarding the zoom lens of Example 5, Tables 9A and 9B show basic lens data, and Table 10 shows specifications and variable surface spacings. FIG. 12 shows aberration diagrams. In FIG. 12, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 2.4 m (meters).

TABLE 9A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	νd	θg, F
1 (Positive)	1	224.29925	2.020	1.62005	36.35	0.58602
	2	96.13932	1.000
	3	96.39725	8.508	1.48563	85.19	0.53858
	4	2359.91868	0.100
	5	116.29160	7.144	1.49782	82.57	0.53862
	6	26534.95814	DD[6]
2 (Negative)	7	−743.19064	1.065	1.72916	54.09	0.54490
	8	64.96697	4.728
	9	−59.87189	1.065	1.43875	94.66	0.53402
	10	98.69517	0.971
	11	105.11245	1.884	2.00272	19.32	0.64514
	12	268.28768	DD[12]
3 (Positive)	13	−2521.15737	4.482	1.49782	82.57	0.53862
	14	−84.57882	0.166
	15	176.97364	3.373	1.49782	82.57	0.53862
	16	−417.75706	DD[16]
4 (Positive)	17	73.22707	7.620	1.43875	94.66	0.53402
	18	−109.51724	1.909	1.89190	37.13	0.57813
	19	1246.73132	DD[19]
5 (Positive)	20	52.82904	1.127	1.83481	42.74	0.56490
	21	34.64336	0.902
	22	34.72752	7.929	1.49700	81.54	0.53748
	23	−217.00119	DD[23]

TABLE 9B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	νd	θg, F
6 (Negative)	24(St)	∞	DD[24]
	25	−422.55790	2.877	1.73800	32.33	0.59005	Focusing group
	26	−43.84508	1.130	1.69680	55.53	0.54404	(Negative)
	27	62.67162	DD[27]
	28	−167.60755	3.217	1.54072	46.97	0.56555
	29	−22.79385	0.860	2.00069	25.46	0.61364
	30	−32.59909	2.886
	31	1437.64894	3.183	1.80519	25.48	0.61354	Vibration-proof
	32	−27.63871	0.930	1.72915	54.64	0.54488	group
	33	47.11749	1.331				(Negative)
	34	−378.34159	0.750	1.81600	46.54	0.55532
	35	47.48196	2.000
	36	24.03476	5.532	1.67300	38.26	0.57580
	37	−20.67528	0.800	2.00069	25.46	0.61364
	38	30.36471	3.078	1.73800	32.33	0.59005
	39	−64.48170	3.915
	40	51.57471	3.348	1.64769	33.84	0.59227
	41	−29.77684	6.052
	42	−19.75350	0.600	1.75500	52.32	0.54757
	43	141.65548	55.226
	44	∞	2.850	1.51680	64.20	0.53430
	45	∞	1.000

TABLE 10
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	2.4 m
distance
Zoom	1.00	3.77
magnification
f	154.681	583.207
FNo.	5.77	8.25	5.86	9.58
2ω[°]	10.4	2.8	10.2	2.4
DD[6]	28.228	99.835	28.228	99.835
DD[12]	80.304	2.636	80.304	2.636
DD[16]	5.993	6.493	5.993	6.493
DD[19]	15.791	28.082	15.791	28.082
DD[23]	12.112	5.382	12.112	5.382
DD[24]	2.878	2.878	4.329	24.547
DD[27]	24.424	24.424	22.973	2.755

EXAMPLE 6

FIG. 13 shows a configuration and movement loci of the zoom lens of Example 6. The zoom lens in Example 6 consists of, in order from the object side to the image side, a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, a fifth lens group G5, and a sixth lens group G6. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of two lenses L31 and L32, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of two lenses L51 and L52, in order from the object side to the image side. The sixth lens group G6 consists of an aperture stop St and twelve lenses L61 to L72, in order from the object side to the image side.

During zooming, the first lens group G1 and the sixth lens group G6 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3, the fourth lens group G4, and the fifth lens group G5. The final lens group GE consists of a sixth lens group G6. The focusing group has a negative refractive power and consists of lenses L61 and L62. The vibration-proof group has a negative refractive power and consists of lenses L65 to L67.

Regarding the zoom lens of Example 6, Tables 11A and 11B show basic lens data, and Table 12 shows specifications and variable surface spacings. FIG. 14 shows aberration diagrams. In FIG. 14, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 11A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	193.87998	2.013	1.62005	36.35	0.58602
(Positive)	2	96.75205	1.000
	3	97.13320	8.680	1.45600	91.37	0.53439
	4	3080.59078	0.100
	5	113.33728	7.319	1.45600	91.37	0.53439
	6	95802.64353	DD[6]
2	7	−461.03477	1.054	1.72916	54.09	0.54490
(Negative)	8	59.79912	4.789
	9	−63.38897	1.047	1.45600	91.37	0.53439
	10	84.71468	1.759
	11	90.41550	2.669	1.77830	23.91	0.62490
	12	1862.27738	DD[12]
3	13	613.07874	4.919	1.45600	91.37	0.53439
(Positive)	14	−87.23632	0.100
	15	98.51590	4.615	1.45600	91.37	0.53439
	16	−448.50319	DD[16]
4	17	101.92607	6.998	1.49700	81.54	0.53748
(Negative)	18	−96.23619	1.897	1.86507	39.80	0.56997
	19	334.45544	DD[19]
5	20	50.68480	1.154	1.83481	42.74	0.56490
(Positive)	21	34.06454	0.851
	22	34.26046	8.159	1.49700	81.54	0.53748
	23	−220.57584	DD[23]

TABLE 11B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
6	24(St)	∞	DD[24]
(Negative)	25	−347.10378	2.962	1.73800	32.33	0.59005	Focusing group
	26	−42.87406	1.141	1.69680	55.53	0.54404	(Negative)
	27	64.39857	DD[27]
	28	−161.97155	3.138	1.54072	46.97	0.56555
	29	−23.26647	0.850	2.00069	25.46	0.61364
	30	−33.35404	2.011
	31	746.75366	3.205	1.80519	25.48	0.61354	Vibration-proof
	32	−27.64972	0.931	1.72915	54.64	0.54488	group
	33	50.00121	1.279				(Negative)
	34	−336.18192	0.739	1.81600	46.54	0.55532
	35	48.16777	2.000
	36	23.64024	5.740	1.67300	38.26	0.57580
	37	−20.24796	0.786	2.00069	25.46	0.61364
	38	29.54475	3.123	1.73800	32.33	0.59005
	39	−64.92123	3.631
	40	51.60231	3.451	1.64769	33.84	0.59227
	41	−30.06231	6.607
	42	−19.33147	0.592	1.75500	52.32	0.54757
	43	122.81190	55.119
	44	∞	2.850	1.51680	64.20	0.53430
	45	∞	1.000

TABLE 12
	Wide angle	Telephoto end	Wide angle	Telephoto end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	3.77
magnification
f	154.649	583.084
FNo.	5.77	8.23	5.86	9.09
2ω[°]	10.4	2.8	10.2	2.4
DD[6]	28.097	101.798	28.097	101.798
DD[12]	81.263	2.629	81.263	2.629
DD[16]	6.411	6.911	6.411	6.911
DD[19]	15.839	27.731	15.839	27.731
DD[23]	11.520	4.060	11.520	4.060
DD[24]	2.715	2.715	4.164	14.794
DD[27]	24.448	24.448	22.999	12.369

EXAMPLE 7

FIG. 15 shows a configuration and movement loci of the zoom lens of Example 7. The zoom lens of Example 7 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of the fourth lens group G4. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 7, Tables 13A and 13B show basic lens data, and Table 14 shows specifications and variable surface spacings. FIG. 16 shows aberration diagrams. In FIG. 16, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 5.0 m (meters).

TABLE 13A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	177.95552	1.802	1.71534	31.79	0.59470
(Positive)	2	122.61425	1.006
	3	124.64540	7.942	1.43425	94.77	0.53209
	4	−595.96280	0.100
	5	269.22282	3.496	1.43425	94.77	0.53209
	6	4626.27307	DD[6]
2	7	−1420.90008	1.070	1.69680	55.53	0.54341
(Negative)	8	105.27448	3.398
	9	−93.22071	1.534	1.43425	94.77	0.53209
	10	101.80983	1.995	1.89286	20.36	0.63944
	11	190.68354	DD[11]
3	12	71.54230	8.726	1.49700	81.54	0.53748
(Positive)	13	−152.56997	3.968
	14	108.36919	6.383	1.49700	81.54	0.53748
	15	−199.27836	0.187
	16	90.15258	9.783	1.43425	94.77	0.53209
	17	−68.60997	1.997	1.92431	35.42	0.58045
	18	−3102.69540	DD[18]
4	19	−202.33884	6.539	1.75567	46.58	0.55980	Focusing
(Negative)	20	−34.04935	1.075	1.71585	55.40	0.54337	group (Negative)
	21	257.72254	DD[21]

TABLE 13B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	22(St)	∞	3.008
(Negative)	23	−123.03765	3.159	1.74853	30.17	0.59879
	24	−39.53502	1.199	1.77017	41.38	0.57145
	25	179.65038	16.201
	26	1367.99008	3.641	1.54814	45.78	0.56859
	27	−32.18403	1.012	2.00069	25.46	0.61364
	28	−41.62964	12.708
	29	95.89155	2.708	1.80519	25.48	0.61354	Vibration−proof
	30	−45.68013	0.840	1.72915	54.64	0.54488	group
	31	43.74133	1.305				(Negative)
	32	−135.44342	0.681	1.81600	46.54	0.55532
	33	49.95355	2.042
	34	31.48672	4.371	1.67300	38.26	0.57580
	35	−29.38441	0.778	2.00069	25.46	0.61364
	36	42.59213	2.675	1.73800	32.33	0.59005
	37	−76.13235	8.117
	38	52.57374	3.140	1.58144	40.75	0.57757
	39	−37.42071	4.767
	40	−25.02160	0.601	1.62041	60.29	0.54266
	41	133.97138	60.793
	42	∞	2.850	1.51680	64.20	0.53430
	43	∞	1.000

TABLE 14
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	5.0 m
distance
Zoom	1.00	2.83
magnification
f	206.068	582.191
FNo.	5.75	8.11	5.78	8.23
2ω[°]	7.8	2.8	7.6	2.4
DD[6]	36.000	119.167	36.000	119.167
DD[11]	91.106	2.230	91.106	2.230
DD[18]	10.788	4.272	14.309	15.578
DD[21]	13.999	26.223	10.478	14.918

EXAMPLE 8

FIG. 17 shows a configuration and movement loci of the zoom lens of Example 8. The zoom lens of Example 8 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of two lenses L11 and L12, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 8, Tables 15A and 15B show basic lens data, and Table 16 shows specifications and variable surface spacings. FIG. 18 shows aberration diagrams. In FIG. 18, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 15A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	116.66342	1.400	1.67300	37.94	0.58175
(Positive)	2	82.05887	0.200
	3	82.40165	10.650	1.45880	89.95	0.53677
	4	−898.43283	DD[4]
2	5	1080.87219	1.068	1.69680	55.53	0.54341
(Negative)	6	137.87226	2.828
	7	−103.95475	1.530	1.45880	89.95	0.53677
	8	65.89325	2.007	1.86074	23.08	0.62589
	9	97.22465	DD[9]
3	10	84.95442	8.008	1.49700	81.54	0.53748
(Positive)	11	−139.70628	1.149
	12	176.44938	5.281	1.49700	81.54	0.53748
	13	−182.76531	0.218
	14	97.57956	8.888	1.45880	89.95	0.53677
	15	−78.16780	2.003	1.96040	31.95	0.59107
	16	−389.31495	DD[16]
4	17	−98.11701	5.132	1.80582	43.52	0.56369
(Negative)	18	−35.92904	1.085	1.74538	49.95	0.55272
	19	−208.29894	DD[19]

TABLE 15B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	20(St)	∞	DD[20]
(Negative)	21	−180.01608	2.629	1.95807	18.38	0.63986	Focusing group
	22	−54.08723	1.211	1.87099	32.32	0.59235	(Negative)
	23	108.34540	DD[23]
	24	180.78958	4.359	1.54814	45.78	0.56859
	25	−28.83635	1.001	2.00069	25.46	0.61364
	26	−41.46196	15.037
	27	102.37573	2.614	1.80519	25.48	0.61354	Vibration−proof
	28	−50.54227	0.852	1.72915	54.64	0.54488	group
	29	38.16261	1.421				(Negative)
	30	−151.07053	0.684	1.81600	46.54	0.55532
	31	51.67096	3.119
	32	36.41580	4.345	1.67300	38.26	0.57580
	33	−27.11678	0.781	2.00069	25.46	0.61364
	34	48.12415	2.558	1.73800	32.33	0.59005
	35	−79.90875	7.676
	36	46.48580	3.492	1.58144	40.75	0.57757
	37	−33.01321	5.354
	38	−24.51064	0.602	1.62041	60.29	0.54266
	39	105.40524	63.228
	40	∞	2.850	1.51680	64.20	0.53430
	41	∞	1.000

TABLE 16
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	2.83
magnification
f	206.176	582.499
FNo.	5.78	8.25	5.98	9.46
2ω[°]	7.8	2.8	7.6	2.4
DD[4]	39.833	123.640	39.833	123.640
DD[9]	94.438	2.195	94.438	2.195
DD[16]	12.185	2.059	12.185	2.059
DD[19]	10.909	29.471	10.909	29.471
DD[20]	2.495	2.495	5.571	17.487
DD[23]	23.786	23.786	20.710	8.794

EXAMPLE 9

FIG. 19 shows a configuration and movement loci of the zoom lens of Example 9. The zoom lens of Example 9 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a positive refractive power and consists of lenses L53 and L54. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 9, Tables 17A and 17B show basic lens data, and Table 18 shows specifications and variable surface spacings. FIG. 20 shows aberration diagrams. In FIG. 20, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 17A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	153.34371	1.500	1.78947	25.82	0.61030
(Positive)	2	121.57771	0.450
	3	129.68176	6.500	1.43875	94.66	0.53402
	4	−2129.82199	0.100
	5	288.97963	3.400	1.43875	94.66	0.53402
	6	−2530.60553	DD[6]
2	7	−32736.73269	1.068	1.69680	55.53	0.54341
(Negative)	8	102.99601	3.393
	9	−95.33232	1.529	1.43875	94.66	0.53402
	10	102.86919	1.835	1.92286	18.90	0.64960
	11	176.94568	DD[11]
3	12	79.84857	8.130	1.49700	81.61	0.53887
(Positive)	13	−154.09312	4.076
	14	143.60850	5.257	1.49700	81.61	0.53887
	15	−245.02662	0.250
	16	87.70608	9.136	1.43875	94.66	0.53402
	17	−80.71773	2.002	1.98872	28.68	0.60249
	18	−437.61247	DD[18]
4	19	−211.22116	5.915	1.76390	47.15	0.55777
(Negative)	20	−37.44131	1.083	1.72212	53.86	0.54611
	21	340.71684	DD[21]

TABLE 17B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	22(St)	∞	2.547
(Negative)	23	−170.04900	3.262	1.89423	21.79	0.62533
	24	−40.91849	1.212	1.78732	37.46	0.58051
	25	132.38822	DD[25]
	26	89.07850	4.541	1.53105	49.41	0.56018	Focusing group
	27	−31.89519	1.008	1.99999	24.94	0.61677	(Positive)
	28	−50.96936	DD[28]
	29	118.42405	2.644	1.80519	25.48	0.61354	Vibration-proof
	30	−43.92274	0.850	1.72915	54.64	0.54488	group
	31	37.69999	1.432				(Negative)
	32	−153.00485	0.686	1.81600	46.54	0.55532
	33	55.74053	2.882
	34	36.79352	3.912	1.67300	38.26	0.57580
	35	−29.45996	0.782	2.00069	25.46	0.61364
	36	42.55495	2.710	1.73800	32.33	0.59005
	37	−75.50003	6.068
	38	54.16685	3.340	1.58144	40.75	0.57757
	39	−32.79644	5.803
	40	−24.52938	0.602	1.62041	60.29	0.54266
	41	118.16051	61.201
	42	∞	2.850	1.51680	64.20	0.53430
	43	∞	1.000

TABLE 18
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	2.83
magnification
f	206.159	582.448
FNo.	5.73	8.15	5.85	9.05
2ω[°]	7.8	2.8	7.6	2.4
DD[6]	35.881	121.093	35.881	121.093
DD[11]	91.656	2.241	91.656	2.241
DD[18]	11.166	2.425	11.166	2.425
DD[21]	11.812	24.756	11.812	24.756
DD[25]	26.158	26.158	22.094	8.975
DD[28]	12.392	12.392	16.456	29.575

EXAMPLE 10

FIG. 21 shows a configuration and movement loci of the zoom lens of Example 10. The zoom lens of Example 10 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a positive refractive power and consists of lenses L53 and L54. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 10, Tables 19A and 19B show basic lens data, and Table 20 shows specifications and variable surface spacings. FIG. 22 shows aberration diagrams. In FIG. 22, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 19A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	172.67111	1.400	1.78472	25.68	0.61621
(Positive)	2	130.09012	6.420	1.45860	90.19	0.53516
	3	−3062.95982	0.100
	4	247.14406	3.500	1.45860	90.19	0.53516
	5	3890.97484	DD[5]
2	6	−1309.30391	1.068	1.69680	55.53	0.54341
(Negative)	7	109.22953	3.188
	8	−101.57143	1.528	1.45860	90.19	0.53516
	9	116.34536	1.681	2.10420	17.02	0.66311
	10	185.20016	DD[10]
3	11	83.20913	8.119	1.48563	85.19	0.53858
(Positive)	12	−143.42355	4.210
	13	174.66912	4.868	1.56908	71.34	0.54530
	14	−236.01946	0.179
	15	96.61313	8.793	1.45860	90.19	0.53516
	16	−79.76037	2.002	1.98264	28.02	0.60503
	17	−441.34431	DD[17]
4	18	−163.72381	5.610	1.77738	45.38	0.56106
(Negative)	19	−37.70235	1.085	1.73171	53.18	0.54663
	20	694.68540	DD[20]

TABLE 19B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	21 (St)	∞	2.734
(Negative)	22	−198.98488	3.389	1.88399	21.19	0.62679
	23	−41.28436	1.213	1.79136	36.11	0.58385
	24	133.52146	DD[24]
	25	66.34685	4.846	1.51729	51.76	0.55600	Focusing group
	26	−31.94330	1.003	1.99098	22.98	0.62412	(Positive)
	27	−50.61957	DD[27]
	28	125.11136	2.698	1.80519	25.48	0.61354	Vibration-proof
	29	−41.36331	0.850	1.72915	54.64	0.54488	group
	30	36.45935	1.528				(Negative)
	31	−128.00086	0.685	1.81600	46.54	0.55532
	32	57.87498	3.906
	33	36.87989	3.975	1.67300	38.26	0.57580
	34	−30.60537	0.781	2.00069	25.46	0.61364
	35	43.88919	2.659	1.73800	32.33	0.59005
	36	−77.04349	5.794
	37	56.84781	3.301	1.58144	40.75	0.57757
	38	−32.22753	5.687
	39	−23.67632	0.600	1.62041	60.29	0.54266
	40	100.88545	61.544
	41	∞	2.850	1.51680	64.20	0.53430
	42	∞	1.000

TABLE 20
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	2.83
magnification
f	206.136	582.384
FNo.	5.78	8.20	5.92	8.90
2ω[°]	7.8	2.8	7.8	2.6
DD[5]	35.979	122.785	35.979	122.785
DD[10]	92.304	2.261	92.304	2.261
DD[17]	11.413	2.509	11.413	2.509
DD[20]	11.766	23.907	11.766	23.907
DD[24]	26.723	26.723	23.549	13.328
DD[27]	11.476	11.476	14.650	24.871

EXAMPLE 11

FIG. 23 shows a configuration and movement loci of the zoom lens of Example 11. The zoom lens of Example 11 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a positive refractive power and consists of lenses L53 and L54. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 11, Tables 21A and 21B show basic lens data, and Table 22 shows specifications and variable surface spacings. FIG. 24 shows aberration diagrams. In FIG. 24, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 21A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	140.85563	1.808	1.75623	27.43	0.60543
(Posi-	2	114.23071	1.000
tive)	3	124.41202	6.970	1.41390	100.82	0.53373
	4	−3620.85973	0.100
	5	294.78468	3.804	1.41390	100.82	0.53373
	6	−1419.52888	DD[6]
2	7	−18500.63696	1.127	1.69680	55.53	0.54341
(Nega-	8	105.58190	3.459
tive)	9	−99.56899	1.612	1.43700	95.10	0.53364
	10	102.57226	1.830	1.92286	18.90	0.64960
	11	166.53476	DD[11]
3	12	82.05906	7.814	1.49700	81.54	0.53748
(Posi-	13	−168.77252	4.340
tive)	14	155.64644	5.057	1.49700	81.54	0.53748
	15	−248.07385	0.244
	16	89.21856	8.783	1.43700	95.10	0.53364
	17	−87.02736	2.003	1.97214	29.58	0.59938
	18	−482.54046	DD[18]
4	19	−209.76505	6.176	1.76759	42.70	0.56836
(Nega-	20	−36.01349	1.077	1.73034	46.64	0.56149
tive)	21	493.25914	DD[21]

TABLE 21B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	22(St)	∞	2.356
(Negative)	23	−201.17310	3.760	1.89267	20.63	0.62896
	24	−40.31388	1.287	1.84217	32.31	0.59296
	25	199.71116	DD[25]
	26	58.34539	6.054	1.57012	45.88	0.56701	Focusing group
	27	−31.39240	1.128	1.99750	22.62	0.62566	(Positive)
	28	−55.27751	DD[28]
	29	151.71250	2.767	1.80519	25.48	0.61354	Vibration-proof
	30	−36.82537	0.845	1.72915	54.64	0.54488	group
	31	34.46756	1.678				(Negative)
	32	−103.62388	0.687	1.81600	46.54	0.55532
	33	51.51340	4.695
	34	36.70574	3.791	1.67300	38.26	0.57580
	35	−30.52373	0.785	2.00069	25.46	0.61364
	36	45.03537	2.581	1.73800	32.33	0.59005
	37	−76.30584	5.800
	38	50.31640	3.482	1.58144	40.75	0.57757
	39	−31.56544	5.409
	40	−22.96588	0.600	1.62041	60.29	0.54266
	41	113.33710	62.884
	42	∞	2.850	1.54763	54.98	0.55247
	43	∞	1.000

TABLE 22
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	2.83
magnification
f	206.240	582.677
FNo.	5.78	8.16	5.82	8.70
2ω[°]	7.8	2.8	7.8	2.6
DD[6]	36.000	124.908	36.000	124.908
DD[11]	92.295	2.274	92.295	2.274
DD[18]	11.151	2.245	11.151	2.245
DD[21]	11.828	21.846	11.828	21.846
DD[25]	25.500	25.500	22.978	14.953
DD[28]	9.463	9.463	11.985	20.010

EXAMPLE 12

FIG. 25 shows a configuration and movement loci of the zoom lens of Example 12. The zoom lens of Example 12 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 12, Tables 23A and 23B show basic lens data, and Table 24 shows specifications and variable surface spacings. FIG. 26 shows aberration diagrams. In FIG. 26, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 23A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	151.21679	1.800	1.76625	27.37	0.60581
(Posi-	2	113.86443	1.037
tive)	3	113.71135	7.052	1.43700	95.10	0.53364
	4	2250.04343	0.100
	5	283.68153	3.407	1.55332	71.68	0.54029
	6	7788.89147	DD[6]
2	7	−2642.01140	1.068	1.69680	55.53	0.54341
(Nega-	8	104.67559	3.453
tive)	9	−90.96108	1.520	1.41390	100.82	0.53373
	10	116.95319	1.704	1.95906	17.47	0.65993
	11	191.62397	DD[11]
3	12	87.67710	7.601	1.55032	75.50	0.54001
(Posi-	13	−157.04082	4.500
tive)	14	151.63674	5.546	1.49700	81.54	0.53748
	15	−189.28233	0.286
	16	93.08292	9.069	1.43875	94.66	0.53402
	17	−77.69216	2.004	1.96405	31.45	0.59275
	18	−519.14600	DD[18]
4	19	−233.04295	6.142	1.75939	47.47	0.55738
(Nega-	20	−36.62799	1.085	1.73496	54.50	0.54330
tive)	21	445.13415	DD[21]

TABLE 23B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	22(St)	∞	DD[22]
(Negative)	23	−161.51676	3.133	1.88086	22.89	0.62140	Focusing group
	24	−43.04594	1.212	1.83166	34.62	0.58667	(Negative)
	25	126.02149	DD[25]
	26	941.07955	3.776	1.54814	45.78	0.56859
	27	−31.43802	1.003	2.00069	25.46	0.61364
	28	−43.18154	13.910
	29	82.94493	2.716	1.80519	25.48	0.61354	Vibration-proof
	30	−51.43725	0.847	1.72915	54.64	0.54488	group
	31	46.63835	1.166				(Negative)
	32	−178.44717	0.681	1.81600	46.54	0.55532
	33	51.16219	2.000
	34	35.36830	4.000	1.67300	38.26	0.57580
	35	−29.08249	0.776	2.00069	25.46	0.61364
	36	43.97499	2.539	1.73800	32.33	0.59005
	37	−85.72633	6.230
	38	58.03141	3.145	1.58144	40.75	0.57757
	39	−34.93637	5.737
	40	−26.07293	0.598	1.62041	60.29	0.54266
	41	106.60164	61.574
	42	∞	2.850	1.51680	64.20	0.53430
	43	∞	1.000

TABLE 24
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	2.83
magnification
f	206.210	582.592
FNo.	5.69	8.15	5.76	9.25
2ω[°]	7.8	2.8	7.6	2.4
DD[6]	36.000	122.213	36.000	122.213
DD[11]	92.213	2.201	92.213	2.201
DD[18]	10.837	2.844	10.837	2.844
DD[21]	12.129	23.921	12.129	23.921
DD[22]	2.814	2.814	6.552	21.273
DD[25]	29.326	29.326	25.588	10.867

EXAMPLE 13

FIG. 27 shows a configuration and movement loci of the zoom lens of Example 13. The zoom lens of Example 13 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of four lenses L11 to L14, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 13, Tables 25A and 25B show basic lens data, and Table 26 shows specifications and variable surface spacings. FIG. 28 shows aberration diagrams. In FIG. 28, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 25A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
	1	193.84095	3.040	1.59270	35.31	0.59336
	2	95.71335	1.500
	3	95.61381	8.100	1.43875	94.66	0.53402
1	4	432.38613	0.300
(Positive)	5	142.30924	4.500	1.49700	81.54	0.53748
	6	334.55265	0.300
	7	186.45243	7.000	1.49700	81.54	0.53748
	8	−6096.41990	DD[8]
	9	−1727.49974	1.067	1.72916	54.09	0.54490
	10	67.80279	4.642
2	11	−59.58705	1.067	1.42537	97.75	0.53434
(Negative)	12	106.94789	0.649
	13	106.01916	2.004	1.98613	16.48	0.66558
	14	206.16928	DD[14]
	15	−1314.65378	4.752	1.43700	95.10	0.53364
	16	−83.22796	2.012
3	17	155.80740	3.859	1.43700	95.10	0.53364
(Positive)	18	−307.65673	0.837
	19	83.33397	7.477	1.43700	95.10	0.53364
	20	−104.78762	1.901	1.89190	37.13	0.57813
	21	−691.24254	DD[21]
	22	54.04923	1.129	1.83481	42.74	0.56490
4	23	36.12282	0.800
(Positive)	24	36.11877	7.585	1.49700	81.54	0.53748
	25	−321.66498	DD[25]

TABLE 25B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	26(St)	∞	DD[26]
(Negative)	27	−416.69562	2.977	1.73800	32.33	0.59005	Focusing group
	28	−42.77052	1.130	1.69680	55.53	0.54404	(Negative)
	29	63.00870	DD[29]
	30	−151.49581	3.190	1.54072	46.97	0.56555
	31	−22.72774	0.860	2.00069	25.46	0.61364
	32	−32.48959	3.292
	33	1410.24102	3.094	1.80519	25.48	0.61354	Vibration-proof
	34	−28.72521	0.930	1.72915	54.64	0.54488	group
	35	47.85221	1.299				(Negative)
	36	−415.80748	0.750	1.81600	46.54	0.55532
	37	49.03771	2.111
	38	24.28681	5.525	1.67300	38.26	0.57580
	39	−20.55175	0.801	2.00069	25.46	0.61364
	40	29.93922	3.263	1.73800	32.33	0.59005
	41	−64.53598	4.138
	42	52.81300	3.480	1.64769	33.84	0.59227
	43	−29.48670	6.158
	44	−19.88657	0.601	1.75500	52.32	0.54757
	45	136.04740	55.452
	46	∞	2.850	1.51680	64.20	0.53430
	47	∞	1.000

TABLE 26
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	3.77
magnification
f	154.634	583.029
FNo.	5.77	8.21	5.86	9.11
2ω[°]	10.4	2.8	10.2	2.4
DD[8]	29.026	101.339	29.026	101.339
DD[14]	82.373	2.627	82.373	2.627
DD[21]	16.667	28.672	16.667	28.672
DD[25]	12.701	8.130	12.701	8.130
DD[26]	2.567	2.567	4.019	14.811
DD[29]	24.428	24.428	22.976	12.184

EXAMPLE 14

FIG. 29 shows a configuration and movement loci of the zoom lens of Example 14. The zoom lens of Example 14 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 14, Tables 27A and 27B show basic lens data, and Table 28 shows specifications and variable surface spacings. FIG. 30 shows aberration diagrams. In FIG. 30, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 27A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	136.26658	5.524	1.49700	81.54	0.53748
(Positive)	2	634.96822	0.200
	3	115.49249	1.500	1.63980	34.47	0.59233
	4	73.34194	10.889	1.43875	94.66	0.53402
	5	2123.61918	DD[5]
2	6	−179.07013	1.065	1.81600	46.54	0.55532
(Negative)	7	59.81604	4.537
	8	−70.83730	1.065	1.48563	85.19	0.53858
	9	116.71402	0.100
	10	91.49144	2.981	1.86074	23.08	0.62589
	11	−714.08169	DD[11]
3	12	879.46240	4.688	1.59282	68.62	0.54414
(Positive)	13	−90.60095	0.100
	14	191.65258	3.134	1.48563	85.19	0.53858
	15	−495.13112	0.100
	16	66.26914	8.012	1.43875	94.66	0.53402
	17	−112.15105	1.900	1.83400	37.21	0.58082
	18	287.53427	DD[18]
4	19	53.23191	1.127	1.83481	42.74	0.56490
(Positive)	20	33.98948	1.414
	21	34.18732	8.140	1.49700	81.54	0.53748
	22	−195.90745	DD[22]

TABLE 27B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	23(St)	∞	DD[23]
(Negative)	24	−549.37302	2.976	1.73800	32.33	0.59005	Focusing group
	25	−42.97473	1.130	1.69680	55.53	0.54404	(Negative)
	26	63.39061	DD[26]
	27	−196.82276	3.374	1.54072	46.97	0.56555
	28	−22.03302	0.859	2.00069	25.46	0.61364
	29	−31.85052	2.026
	30	−1559.09553	3.166	1.80519	25.48	0.61354	Vibration-proof
	31	−26.94876	0.930	1.72915	54.64	0.54488	group
	32	48.14068	1.250				(Negative)
	33	−602.84512	0.749	1.81600	46.54	0.55532
	34	43.78683	2.000
	35	23.29200	5.543	1.67300	38.26	0.57580
	36	−21.14392	0.800	2.00069	25.46	0.61364
	37	31.66758	3.019	1.73800	32.33	0.59005
	38	−63.94011	3.537
	39	53.65762	3.285	1.64769	33.84	0.59227
	40	−28.63100	5.156
	41	−19.07298	0.600	1.75500	52.32	0.54757
	42	91.87104	50.866
	43	∞	2.850	1.51680	64.20	0.53430
	44	∞	1.000

TABLE 28
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	3.77
magnification
f	154.645	583.070
FNo.	5.73	8.16	5.82	8.98
2ω[°]	10.4	2.8	10.2	2.4
DD[5]	22.976	94.528	22.976	94.528
DD[11]	79.364	2.224	79.364	2.224
DD[18]	16.580	29.355	16.580	29.355
DD[22]	12.427	5.240	12.427	5.240
DD[23]	2.761	2.761	4.217	15.097
DD[26]	24.344	24.344	22.888	12.008

EXAMPLE 15

FIG. 31 shows a configuration and movement loci of the zoom lens of Example 15. The zoom lens of Example 15 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 15, Tables 29A and 29B show basic lens data, and Table 30 shows specifications and variable surface spacings. FIG. 32 shows aberration diagrams. In FIG. 32, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 29A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	186.14109	3.000	1.90994	36.35	0.57986
(Positive)	2	112.42137	10.170	1.49700	81.61	0.53887
	3	−21529.51252	0.100
	4	109.61204	11.358	1.43875	94.66	0.53402
	5	28626.57363	DD[5]
2	6	−290.53700	1.500	1.88005	40.00	0.57053
(Negative)	7	59.92096	8.494
	8	−65.07354	1.510	1.43875	94.66	0.53402
	9	81.10267	3.703	1.84999	22.50	0.62921
	10	−2917.91799	DD[10]
3	11	−1682.60184	4.804	1.49700	81.61	0.53887
(Positive)	12	−105.01259	0.100
	13	196.29627	4.166	1.59282	68.62	0.54414
	14	−352.09713	0.100
	15	89.42457	7.470	1.49700	81.61	0.53887
	16	−95.88852	1.500	1.95000	32.98	0.58835
	17	−565.63038	DD[17]
4	18	53.00965	1.500	1.84232	43.77	0.56261
(Positive)	19	36.85885	7.736	1.43875	94.66	0.53402
	20	−159.48975	DD[20]

TABLE 29B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	21(St)	∞	DD[21]
(Negative)	22	−102.98265	3.494	1.82939	27.23	0.60965	Focusing group
	23	−49.42425	1.110	1.53179	63.78	0.53722	(Negative)
	24	62.16193	DD[24]
	25	−1372.17007	3.510	1.50137	54.78	0.55282
	26	−29.99893	1.000	1.94982	22.16	0.63328
	27	−44.00267	3.453
	28	74.28517	5.630	1.79380	25.31	0.61668	Vibration-proof
	29	−31.56623	1.012	1.75089	52.91	0.54691	group
	30	30.73011	2.107				(Negative)
	31	−79.23467	0.850	1.89971	38.03	0.57540
	32	61.28117	2.005
	33	20.32578	5.829	1.61340	44.27	0.56340
	34	−17.00002	1.000	1.94991	29.07	0.60089
	35	28.55968	0.805
	36	55.75314	3.114	1.68997	30.72	0.60225
	37	−48.52530	2.000
	38	35.63283	5.483	1.57699	40.56	0.57831
	39	−23.42745	8.869
	40	−18.10947	1.000	1.80795	47.21	0.55625
	41	−116.30816	45.865
	42	∞	2.850	1.51680	64.20	0.53430
	43	∞	1.000

TABLE 30
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	5.66
magnification
f	103.077	582.958
FNo.	5.75	6.46	5.80	7.15
2ω[°]	15.6	2.8	15.6	2.4
DD[5]	11.016	107.809	11.016	107.809
DD[10]	104.998	2.701	104.998	2.701
DD[17]	14.854	23.491	14.854	23.491
DD[20]	6.007	2.874	6.007	2.874
DD[21]	3.090	3.090	3.773	15.799
DD[24]	29.879	29.879	29.196	17.170

EXAMPLE 16

FIG. 33 shows a configuration and movement loci of the zoom lens of Example 16. The zoom lens of Example 16 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 16, Tables 31A and 31B show basic lens data, and Table 32 shows specifications and variable surface spacings. FIG. 34 shows aberration diagrams. In FIG. 34, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 31A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	211.43590	3.001	1.90996	36.98	0.57605
(Positive)	2	123.47916	10.330	1.49700	81.61	0.53887
	3	11596.30457	0.101
	4	128.14874	13.000	1.43875	94.66	0.53402
	5	−1779.92702	DD[5]
2	6	−289.09458	1.501	1.79002	49.00	0.55077
(Negative)	7	85.78904	4.022
	8	−82.32361	1.510	1.43875	94.66	0.53402
	9	108.76860	3.700	1.84947	22.53	0.62133
	10	973.29497	DD[10]
3	11	13159.24577	4.841	1.49700	81.61	0.53887
(Positive)	12	−124.90797	0.101
	13	108.65019	6.079	1.59282	68.62	0.54414
	14	−223.66161	0.103
	15	78.18121	6.872	1.49700	81.61	0.53887
	16	−169.31272	1.501	1.94968	33.03	0.58758
	17	254.39897	DD[17]
4	18	72.56524	1.501	1.78937	49.06	0.55066
(Positive)	19	49.90776	7.856	1.43875	94.66	0.53402
	20	−1054.68925	DD[20]

TABLE 31B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	21(St)	∞	DD[21]
(Negative)	22	−261.40240	2.962	1.89403	31.14	0.59555	Focusing group
	23	−40.43158	1.377	1.79313	48.69	0.55125	(Negative)
	24	63.37450	DD[24]
	25	99.04396	3.630	1.50002	55.00	0.55022
	26	−27.90787	1.073	1.94998	22.15	0.62606
	27	−42.98410	2.191
	28	118.22054	3.760	1.77313	26.34	0.60852	Vibration-proof
	29	−26.23359	1.010	1.74129	53.87	0.54406	group
	30	29.75059	1.774				(Negative)
	31	−114.40070	0.851	1.82415	45.54	0.55668
	32	43.19509	2.000
	33	18.43760	5.512	1.61340	44.27	0.56340
	34	−17.00068	1.001	1.94991	29.15	0.60130
	35	26.69834	0.626
	36	46.43260	2.900	1.69636	30.26	0.59756
	37	−51.30538	2.000
	38	30.68093	4.418	1.58228	39.77	0.57704
	39	−23.48534	7.038
	40	−17.14975	1.000	1.75959	52.04	0.54638
	41	−471.17200	38.111
	42	∞	2.850	1.51680	64.20	0.53430
	43	∞	1.000

TABLE 32
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	2.83
magnification
f	206.209	583.825
FNo.	5.79	6.49	5.95	7.20
2ω[°]	7.8	2.8	7.6	2.4
DD[5]	34.341	114.099	34.341	114.099
DD[10]	75.353	2.622	75.353	2.622
DD[17]	15.177	23.424	15.177	23.424
DD[20]	17.987	2.714	17.987	2.714
DD[21]	5.330	5.330	7.902	17.729
DD[24]	29.875	29.875	27.303	17.476

EXAMPLE 17

FIG. 35 shows a configuration and movement loci of the zoom lens of Example 17. The zoom lens of Example 17 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 17, Tables 33A and 33B show basic lens data, and Table 34 shows specifications and variable surface spacings. FIG. 36 shows aberration diagrams. In FIG. 36, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 33A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	226.14252	3.000	1.88096	37.74	0.57670
(Positive)	2	130.01359	10.170	1.49700	81.61	0.53887
	3	15228.54893	0.100
	4	130.67904	10.300	1.43875	94.66	0.53402
	5	−4483.75721	DD[5]
2	6	−305.71992	1.500	1.89119	38.88	0.57329
(Negative)	7	87.45453	8.500
	8	−85.48480	1.510	1.43875	94.66	0.53402
	9	117.96782	3.700	1.84725	22.64	0.62858
3	10	−640.73159	DD[10]
(Positive)	11	377.99496	4.800	1.49700	81.61	0.53887
	12	−142.00030	0.100
	13	156.60361	4.216	1.59282	68.62	0.54414
	14	−659.39313	0.100
	15	89.74515	6.502	1.49700	81.61	0.53887
	16	−168.96306	1.500	1.94233	33.77	0.58632
	17	475.41730	DD[17]
4	18	59.57361	1.501	1.82625	45.37	0.55966
(Positive)	19	41.95960	6.776	1.43875	94.66	0.53402
	20	−340.05492	DD[20]

TABLE 33B
	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	21(St)	∞	DD[21]
(Negative)	22	−283.73848	2.935	1.82761	30.63	0.59898	Focusing group
	23	−45.79809	1.110	1.72979	55.01	0.54409	(Negative)
	24	62.89250	DD[24]
	25	−148.03604	4.389	1.50003	54.99	0.55247
	26	−26.44052	1.297	1.95000	22.24	0.63287
	27	−37.45235	10.372
	28	153.77355	4.043	1.72778	28.61	0.60755	Vibration-proof
	29	−19.93925	1.010	1.70732	56.13	0.54358	group
	30	31.36420	1.605				(Negative)
	31	−154.89074	0.850	1.90000	38.00	0.57547
	32	52.41717	2.000
	33	18.97450	5.496	1.61340	44.27	0.56340
	34	−17.00000	1.000	1.95000	27.45	0.60602
	35	26.30499	0.801
	36	51.00103	2.965	1.76781	26.61	0.61319
	37	−52.72804	2.202
	38	31.15660	4.836	1.57924	40.14	0.57909
	39	−23.27607	7.106
	40	−17.97089	1.000	1.76158	51.84	0.54845
	41	−274.09801	45.479
	42	∞	2.850	1.51680	64.20	0.53430
	43	∞	1.000

TABLE 34
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	3.77
magnification
f	170.109	641.376
FNo.	6.39	7.12	6.49	7.87
2ω[°]	9.6	2.6	9.4	2.2
DD[5]	18.967	125.440	18.967	125.440
DD[10]	104.605	2.896	104.605	2.896
DD[17]	16.305	25.656	16.305	25.656
DD[20]	16.972	2.856	16.972	2.856
DD[21]	4.835	4.835	6.331	17.253
DD[24]	26.781	26.781	25.285	14.363

EXAMPLE 18

FIG. 37 shows a configuration and movement loci of the zoom lens of Example 18. The zoom lens of Example 18 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 18, Tables 35A and 35B show basic lens data, and Table 36 shows specifications and variable surface spacings. FIG. 38 shows aberration diagrams. In FIG. 38, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 35A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	164.02122	3.000	1.91000	35.70	0.58170
(Positive)	2	100.90612	12.017	1.49700	81.61	0.53887
	3	2037.08487	0.100
	4	106.30309	12.365	1.43875	94.66	0.53402
	5	−1344.92986	DD[5]
2	6	−209.81698	1.500	1.84699	43.30	0.56347
(Negative)	7	67.71709	4.000
	8	−67.72814	1.500	1.43875	94.66	0.53402
	9	83.93874	3.708	1.85001	22.50	0.62922
	10	6618.29968	DD[10]
3	11	315.63732	4.911	1.59282	68.62	0.54414
(Positive)	12	−132.98621	0.100
	13	114.89776	5.234	1.59282	68.62	0.54414
	14	−314.41475	0.100
	15	73.56486	7.337	1.49700	81.61	0.53887
	16	−119.28284	1.510	1.94636	32.81	0.58894
	17	327.51360	DD[17]
4	18	46.51069	1.500	1.82582	45.42	0.55959
(Positive)	19	32.60239	8.008	1.43875	94.66	0.53402
	20	−211.73745	DD[20]

TABLE 35B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	21(St)	∞	DD[21]
(Negative)	22	−193.54635	3.500	1.66048	36.08	0.58736	Focusing group
	23	−34.13180	1.598	1.58235	61.67	0.54202	(Negative)
	24	44.39519	DD[24]
	25	−631.07057	3.508	1.50000	55.02	0.55243
	26	−24.43229	1.000	1.95000	22.15	0.63334
	27	−35.34238	2.079
	28	69.79241	3.849	1.78981	25.51	0.61618	Vibration-proof
	29	−27.94246	1.008	1.75896	52.10	0.54807	group
	30	24.30997	2.071				(Negative)
	31	−69.18183	0.850	1.82508	45.49	0.55945
	32	43.31089	2.000
	33	16.15294	5.787	1.57649	47.08	0.56498
	34	−17.36747	1.000	1.95000	30.42	0.59652
	35	23.20724	0.508
	36	41.02495	3.150	1.67236	31.97	0.59927
	37	−37.03764	2.000
	38	24.77898	4.826	1.58000	40.00	0.57935
	39	−22.61871	5.310
	40	−16.57420	1.000	1.83453	44.55	0.56118
	41	−213.95654	34.565
	42	∞	2.850	1.51680	64.20	0.53430
	43	∞	1.000

TABLE 36
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	3.77
magnification
f	128.944	486.169
FNo.	5.75	5.15	5.81	6.16
2ω[°]	12.4	3.2	12.4	3.0
DD[5]	11.790	88.822	11.790	88.822
DD[10]	79.444	2.712	79.444	2.712
DD[17]	11.834	16.510	11.834	16.510
DD[20]	7.749	2.773	7.749	2.773
DD[21]	4.957	4.957	5.895	12.874
DD[24]	19.029	19.029	18.091	11.112

EXAMPLE 19

FIG. 39 shows a configuration and movement loci of the zoom lens of Example 19. The zoom lens of Example 19 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The focusing group has a negative refractive power and consists of lenses L51 and L52. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 19, Tables 37A and 37B show basic lens data, and Table 38 shows specifications and variable surface spacings. FIG. 40 shows aberration diagrams. In FIG. 40, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 4.0 m (meters).

TABLE 37A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	190.57386	3.000	1.90993	35.73	0.58015
(Positive)	2	118.10958	10.150	1.49700	81.61	0.53887
	3	3616.72223	0.020
	4	118.88631	10.850	1.43875	94.66	0.53402
	5	−7560.12246	DD[5]
2	6	−286.93836	1.500	1.87707	40.29	0.56765
(Negative)	7	71.08535	8.494
	8	−73.82001	1.510	1.43875	94.66	0.53402
	9	96.75409	3.703	1.84999	22.50	0.62144
	10	−1240.69298	DD[10]
3	11	668.40251	4.805	1.49700	81.61	0.53887
(Positive)	12	−124.44670	0.100
	13	160.64704	4.281	1.59282	68.62	0.54414
	14	−570.93355	0.100
	15	91.25740	7.066	1.49700	81.61	0.53887
	16	−120.50729	1.500	1.95000	32.98	0.58776
	17	−8400.90852	DD[17]
4	18	51.77658	1.500	1.83538	44.46	0.55869
(Positive)	19	36.41979	7.720	1.43875	94.66	0.53402
	20	−210.79502	DD[20]

TABLE 37B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	21(St)	∞	DD[21]
(Negative)	22	−147.38924	3.492	1.73224	28.52	0.60228	Focusing group
	23	−50.01792	1.110	1.54728	63.18	0.54037	(Negative)
	24	55.89500	DD[24]
	25	13647.03576	3.510	1.50140	54.77	0.55064
	26	−31.60680	1.000	1.94982	22.16	0.62602
	27	−45.77513	4.230
	28	90.96441	3.769	1.86440	21.78	0.62416	Vibration-proof
	29	−33.30886	1.012	1.85569	42.43	0.56284	group
	30	29.79876	1.943				(Negative)
	31	−102.59837	0.850	1.89970	38.03	0.57325
	32	65.68024	2.006
	33	19.65186	5.553	1.61340	44.27	0.56340
	34	−17.00002	1.000	1.94991	26.92	0.60921
	35	28.24937	0.809
	36	59.04101	2.916	1.69950	30.04	0.59812
	37	−51.50853	2.000
	38	36.13918	5.477	1.62974	35.03	0.58660
	39	−23.73258	7.257
	40	−18.35871	1.000	1.77778	50.22	0.54891
	41	−198.06396	43.298
	42	∞	2.850	1.51680	64.20	0.53430
	43	∞	1.000

TABLE 38
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	4.0 m
distance
Zoom	1.00	4.71
magnification
f	123.675	582.876
FNo.	5.76	6.46	5.81	7.07
2ω[°]	13.0	2.8	13.0	2.6
DD[5]	11.070	111.590	11.070	111.590
DD[10]	104.995	2.828	104.995	2.828
DD[17]	15.440	23.816	15.440	23.816
DD[20]	9.513	2.784	9.513	2.784
DD[21]	3.571	3.571	4.479	15.346
DD[24]	29.993	29.993	29.085	18.218

EXAMPLE 20

FIG. 41 shows a configuration and movement loci of the zoom lens of Example 20. The zoom lens of Example 20 consists of a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5, in order from the object side to the image side. The first lens group G1 consists of three lenses L11 to L13, in order from the object side to the image side. The second lens group G2 consists of three lenses L21 to L23, in order from the object side to the image side. The third lens group G3 consists of four lenses L31 to L34, in order from the object side to the image side. The fourth lens group G4 consists of two lenses L41 and L42, in order from the object side to the image side. The fifth lens group G5 consists of an aperture stop St and twelve lenses L51 to L62, in order from the object side to the image side.

During zooming, the first lens group G1 and the fifth lens group G5 remain stationary with respect to the image plane Sim, and the second lens group G2, the third lens group G3, and the fourth lens group G4 move along the optical axis Z by changing the spacings between the adjacent lens groups. The middle group GM consists of the third lens group G3 and the fourth lens group G4. The final lens group GE consists of the fifth lens group G5. The zoom lens of Example 20 has two focusing groups. The first focusing group has a negative refractive power and consists of lenses L51 and L52. The second focusing group has a positive refractive power and consists of lenses L53 and L54. The vibration-proof group has a negative refractive power and consists of lenses L55 to L57.

Regarding the zoom lens of Example 20, Tables 39A and 39B show basic lens data, and Table 40 shows specifications and variable surface spacings. FIG. 42 shows aberration diagrams. In FIG. 42, the top row shows aberrations in the wide angle end state in which the imaging distance is infinite, the second row shows aberrations in the telephoto end state in which the imaging distance is infinite, the third row shows aberrations in the wide angle end state in which the imaging distance is 2.4 m (meters), and the bottom row shows aberrations in the telephoto end state in which the imaging distance is 2.4 m (meters).

TABLE 39A
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
1	1	245.02489	1.801	1.62005	36.35	0.58602
(Positive)	2	111.83425	1.000
	3	113.13671	8.300	1.43700	95.10	0.53364
	4	−735.94906	0.100
	5	100.56069	7.340	1.43700	95.10	0.53364
	6	1197.80101	DD[6]
2	7	−451.53960	1.066	1.72916	54.09	0.54490
(Negative)	8	61.76488	4.850
	9	−59.86060	1.067	1.43700	95.10	0.53364
	10	101.17255	1.882
	11	110.08682	2.129	1.89286	20.36	0.63944
	12	547.66662	DD[12]
3	13	−1209.55313	4.420	1.49700	81.54	0.53748
(Positive)	14	−83.17188	0.145
	15	146.00056	3.799	1.49700	81.54	0.53748
	16	−443.68260	0.505
	17	81.97926	7.440	1.43875	94.66	0.53402
	18	−113.84532	1.901	1.89190	37.13	0.57813
	19	1289.85682	DD[19]
4	20	54.31494	1.127	1.83481	42.74	0.56490
(Positive)	21	34.71008	1.259
	22	34.77574	8.290	1.49700	81.54	0.53748
	23	−217.92422	DD[23]

TABLE 39B
Group	Surface	Curvature	Surface
number	number	radius	spacing	Nd	vd	θg, F
5	24(St)	∞	DD[24]
(Negative)	25	−246.68690	2.627	1.75425	32.66	0.59295	Focusing group
	26	−45.84221	1.130	1.64569	57.71	0.54516	(Negative)
	27	57.80003	DD[27]
	28	−903.94340	3.393	1.52521	50.38	0.55845	Focusing group
	29	−23.61976	0.860	1.98392	27.15	0.60828	(Positive)
	30	−34.91974	DD[30]
	31	163.55449	3.601	1.80519	25.48	0.61354	Vibration-proof
	32	−28.99025	0.930	1.72915	54.64	0.54488	group
	33	46.74344	1.610				(Negative)
	34	−133.04632	0.750	1.81600	46.54	0.55532
	35	43.52783	2.000
	36	25.63038	5.663	1.72047	34.71	0.58350
	37	−21.35197	0.801	2.00069	25.46	0.61364
	38	37.06899	3.126	1.67300	38.26	0.57580
	39	−61.03746	4.646
	40	51.15125	3.482	1.65412	39.68	0.57378
	41	−30.52552	4.798
	42	−21.08587	0.601	1.74100	52.64	0.54676
	43	84.89353	54.346
	44	∞	2.850	1.51680	64.20	0.53430
	45	∞	1.000

TABLE 40
	Wide angle	Telephoto	Wide angle	Telephoto
	end	end	end	end
Imaging	Infinity	Infinity	2.4 m	2.4 m
distance
Zoom	1.00	3.77
magnification
f	154.644	583.069
FNo.	5.77	8.23	5.86	9.66
2ω[°]	10.4	2.8	10.2	2.4
DD[6]	29.945	101.730	29.945	101.730
DD[12]	81.228	5.173	81.228	5.173
DD[19]	17.114	29.974	17.114	29.974
DD[23]	13.956	5.366	13.956	5.366
DD[24]	2.200	2.200	3.318	17.395
DD[27]	28.301	28.301	26.371	2.062
DD[30]	2.087	2.087	2.899	13.130

Tables 41 to 45 each show corresponding values of Conditional Expressions (1) to (39) of the zoom lenses of Examples 1 to 20.

TABLE 41
Expression
number	Conditional expression	Example 1	Example 2	Example 3	Example 4
(1)	IH/ft	0.024	0.024	0.024	0.024
(2)	DG1/IH	1.257	1.045	1.311	1.063
(3)	Bm	7.647	7.955	6.673	8.545
(4)	|(1-βist) × βisrt|	2.890	2.855	2.900	2.604
(5)	v1p	95.10	85.19	82.57	97.75
(6)	v1pave	95.10	85.19	82.57	97.75
(7)	Δθ1p	0.04607	0.03542	0.03077	0.05107
(8)	Δθ1pave	0.04607	0.03542	0.03077	0.05107
(9)	vMp	95.10	85.19	100.82	97.75
(10)	vMpave	86.06	82.51	87.97	83.33
(11)	ΔθMp	0.04607	0.03542	0.05573	0.05107
(12)	ΔθMpave	0.03403	0.03099	0.03725	0.03137
(13)	N1n	1.620	1.620	1.620	1.667
(14)	v2p	22.73	20.88	20.36	22.76
(15)	Δθ2p	0.02363	0.03124	0.03069	0.02598
(16)	v2n	95.10	85.19	82.57	95.10
(17)	Δθ2n	0.04607	0.03542	0.03077	0.04607
(18)	βEt	3.064	3.091	3.050	3.112
(19)	fMp/(fw × ft)1/2	0.284	0.197	0.290	0.174
(20)	|β2t|	2.309	2.285	2.303	2.454
(21)	|fis/fisr|	0.530	0.565	0.641	0.533
(22)	D1n/(ft/FNot)	0.025	0.025	0.028	0.026
(23)	(fMw × fMt)1/2/(fw × ft)1/2	0.212	0.197	0.216	0.189
(24)	|f2|/fPA	0.628	1.155	0.639	1.327
(25)	TLt/ft	0.556	0.591	0.549	0.593
(26)	|fE|/ft	0.065	0.060	0.057	0.075
(27)	β2t/β2w	4.123	3.637	4.019	3.882
(28)	βPArt	1.664	3.091	1.621	2.456
(29)	f1/(fw × ft)1/2	0.610	0.720	0.634	0.724
(30)	|f2|/fw	0.347	0.382	0.361	0.389
(31)	ffp/|ffn|	1.736	1.676	—	2.080
(32)	f1/|f2|	3.417	3.172	3.416	3.126
(33)	|f2|/(fw × ft)1/2	0.179	0.227	0.186	0.231
(34)	fPA/(fw × ft)1/2	0.284	0.197	0.290	0.174
(35)	|fE|/(fw × ft)1/2	0.127	0.102	0.112	0.127
(36)	|ff|/(fw × ft)1/2	0.260	0.247	0.402	0.223
(37)	|fis|/(fw × ft)1/2	0.091	0.090	0.109	0.098
(38)	DMnp/(RMnpf + RMnpr)	0.022	0.000	0.025	0.000
(39)	DEnp/(REnpf + REnpr)	−0.107	−0.128	−0.118	−0.082

TABLE 42
Expression
number	Conditional expression	Example 5	Example 6	Example 7	Example 8
(1)	IH/ft	0.024	0.024	0.024	0.024
(2)	DG1/IH	1.322	1.346	1.010	0.863
(3)	Bm	7.600	7.620	6.722	6.478
(4)	|(1-βist) × βisrt|	2.887	2.882	2.582	2.825
(5)	v1p	85.19	91.36	94.77	89.95
(6)	v1pave	83.88	91.36	94.77	89.95
(7)	Δθ1p	0.03542	0.04061	0.04404	0.04093
(8)	Δθ1pave	0.03310	0.04061	0.04404	0.04093
(9)	vMp	82.57	91.36	94.77	89.95
(10)	vMpave	82.57	91.36	85.95	84.34
(11)	ΔθMp	0.03077	0.04061	0.04404	0.04093
(12)	ΔθMpave	0.03077	0.04061	0.03335	0.03231
(13)	N1n	1.620	1.620	1.715	1.673
(14)	v2p	19.32	23.91	20.36	23.08
(15)	Δθ2p	0.03481	0.02194	0.03069	0.02160
(16)	v2n	94.66	91.36	95.00	90.00
(17)	Δθ2n	0.04576	0.04061	0.04631	0.04121
(18)	βEt	3.096	3.088	2.308	2.664
(19)	fMp/(fw × ft)1/2	0.345	0.289	0.185	0.185
(20)	|β2t|	2.373	2.471	1.787	1.575
(21)	|fis/fisr|	0.659	0.691	0.608	0.530
(22)	D1n/(ft/FNot)	0.028	0.028	0.025	0.020
(23)	(fMw × fMt)1/2/(fw × ft)1/2	0.211	0.215	0.228	0.215
(24)	|f2|/fPA	0.525	0.649	1.293	1.331
(25)	TLt/ft	0.559	0.565	0.600	0.616
(26)	|fE|/ft	0.061	0.059	0.112	0.095
(27)	β2t/β2w	4.130	4.286	2.797	2.546
(28)	βPArt	1.177	1.754	3.471	3.433
(29)	f1/(fw × ft)1/2	0.617	0.624	0.739	0.792
(30)	|f2|/fw	0.351	0.356	0.401	0.414
(31)	ffp/|ffn|	1.792	1.795	1.270	1.935
(32)	f1/|f2|	3.411	3.405	3.097	3.211
(33)	|f2|/(fw × ft)1/2	0.181	0.183	0.239	0.247
(34)	fPA/(fw × ft)1/2	0.345	0.282	0.185	0.185
(35)	|fE|/(fw × ft)1/2	0.118	0.115	0.188	0.160
(36)	|ff|/(fw × ft)1/2	0.279	0.277	0.538	0.244
(37)	|fis|/(fw × ft)1/2	0.105	0.110	0.101	0.094
(38)	DMnp/(RMnpf + RMnpr)	0.013	0.012	−0.003	−0.025
(39)	DEnp/(REnpf + REnpr)	−0.122	−0.134	−0.076	−0.093

TABLE 43
Expression
number	Conditional expression	Example 9	Example 10	Example 11	Example 12
(1)	IH/ft	0.024	0.024	0.024	0.024
(2)	DG1/IH	0.842	0.804	0.963	0.943
(3)	Bm	4.675	6.000	7.549	5.378
(4)	|(1-βist) × βisrt|	2.758	2.950	3.401	2.255
(5)	v1p	94.66	90.19	100.82	95.10
(6)	v1pave	94.66	90.19	100.82	83.40
(7)	Δθ1p	0.04576	0.03962	0.05573	0.04607
(8)	Δθ1pave	0.04576	0.03962	0.05573	0.03051
(9)	vMp	94.66	90.19	95.10	94.66
(10)	vMpave	85.96	82.24	86.06	83.90
(11)	ΔθMp	0.04576	0.03962	0.04607	0.04576
(12)	ΔθMpave	0.03493	0.03134	0.03403	0.03153
(13)	N1n	1.789	1.787	1.756	1.766
(14)	v2p	18.90	17.02	18.90	17.47
(15)	Δθ2p	0.03853	0.04908	0.03853	0.04651
(16)	v2n	94.66	90.19	95.10	101.00
(17)	Δθ2n	0.04576	0.03962	0.04607	0.05603
(18)	βEt	2.303	2.253	2.246	2.442
(19)	fMp/(fw × ft)1/2	0.189	0.191	0.196	0.187
(20)	|β2t|	1.947	2.004	2.055	1.871
(21)	|fis/fisr|	0.525	0.467	0.444	0.590
(22)	D1n/(ft/FNot)	0.021	0.025	0.025	0.025
(23)	(fMw × fMt)1/2/(fw × ft)1/2	0.234	0.239	0.239	0.226
(24)	|f2|/fPA	1.265	1.261	1.231	1.288
(25)	TLt/ft	0.606	0.607	0.612	0.616
(26)	|fE|/ft	0.110	0.110	0.113	0.106
(27)	β2t/β2w	3.001	3.078	3.192	2.931
(28)	βPArt	3.372	3.334	3.193	3.415
(29)	f1/(fw × ft)1/2	0.736	0.738	0.744	0.747
(30)	|f2|/fw	0.403	0.405	0.405	0.406
(31)	ffp/|ffn|	—	—	—	1.711
(32)	f1/|f2|	3.072	3.064	3.093	3.097
(33)	|f2|/(fw × ft)1/2	0.240	0.241	0.241	0.241
(34)	fPA/(fw × ft)1/2	0.189	0.191	0.196	0.187
(35)	|fE|/(fw × ft)1/2	0.185	0.185	0.191	0.178
(36)	|ff|/(fw × ft)1/2	0.266	0.231	0.205	0.263
(37)	|fis|/(fw × ft)1/2	0.094	0.090	0.077	0.118
(38)	DMnp/(RMnpf + RMnpr)	−0.017	−0.019	−0.016	−0.014
(39)	DEnp/(REnpf + REnpr)	−0.101	−0.102	−0.099	−0.094

TABLE 44
Expression
number	Conditional expression	Example 13	Example 14	Example 15	Example 16
(1)	IH/ft	0.024	0.024	0.024	0.024
(2)	DG1/IH	1.742	1.276	1.734	1.861
(3)	Bm	7.591	7.553	7.274	7.634
(4)	|(1-βist) × βisrt|	2.833	2.856	2.887	2.885
(5)	v1p	94.66	94.66	94.66	94.66
(6)	v1pave	85.96	88.10	88.14	88.14
(7)	Δθ1p	0.04576	0.04576	0.04576	0.04576
(8)	Δθ1pave	0.03392	0.03688	0.03764	0.03764
(9)	vMp	95.10	94.66	81.61	81.61
(10)	vMpave	95.10	82.82	77.28	77.28
(11)	ΔθMp	0.04607	0.04576	0.02952	0.02952
(12)	ΔθMpave	0.04607	0.03158	0.02420	0.02420
(13)	N1n	1.593	1.640	1.910	1.910
(14)	v2p	16.48	23.08	22.50	22.53
(15)	Δθ2p	0.05071	0.02160	0.02406	0.02401
(16)	v2n	97.75	85.19	94.66	94.66
(17)	Δθ2n	0.04977	0.03542	0.04576	0.04576
(18)	βEt	3.091	3.168	3.083	3.080
(19)	fMp/(fw × ft)1/2	0.292	0.289	0.346	0.230
(20)	|β2t|	2.147	2.403	2.507	2.902
(21)	|fis/fisr|	0.663	0.583	0.668	0.598
(22)	D1n/(ft/FNot)	0.043	0.028	0.033	0.033
(23)	(fMw × fMt)1/2/(fw × ft)1/2	0.208	0.206	0.242	0.189
(24)	|f2|/fPA	0.630	0.624	0.614	0.867
(25)	TLt/ft	0.573	0.530	0.580	0.566
(26)	|fE|/ft	0.061	0.053	0.058	0.051
(27)	β2t/β2w	3.809	4.178	6.027	4.352
(28)	βPArt	1.571	1.633	1.637	2.304
(29)	f1/(fw × ft)1/2	0.645	0.610	0.786	0.634
(30)	|f2|/fw	0.357	0.350	0.506	0.335
(31)	ffp/|ffn|	1.763	1.722	2.157	1.718
(32)	f1/|f2|	3.504	3.384	3.698	3.183
(33)	|f2|/(fw × ft)1/2	0.184	0.180	0.213	0.199
(34)	fPA/(fw × ft)1/2	0.292	0.289	0.346	0.230
(35)	|fE|/(fw × ft)1/2	0.119	0.103	0.138	0.085
(36)	|ff|/(fw × ft)1/2	0.280	0.292	0.384	0.214
(37)	|fis|/(fw × ft)1/2	0.108	0.100	0.110	0.066
(38)	DMnp/(RMnpf + RMnpr)	0.011	0.021	0.000	0.000
(39)	DEnp/(REnpf + REnpr)	−0.125	−0.108	−0.214	−0.173

TABLE 45
Expression
number	Conditional expression	Example 17	Example 18	Example 19	Example 20
(1)	IH/ft	0.022	0.029	0.024	0.024
(2)	DG1/IH	1.660	1.935	1.699	1.306
(3)	Bm	9.063	8.101	7.859	7.631
(4)	|(1-βist) × βisrt|	2.888	2.886	2.887	2.883
(5)	v1p	94.66	94.66	94.66	95.10
(6)	v1pave	88.14	88.14	88.14	95.10
(7)	Δθ1p	0.04576	0.04576	0.04576	0.04607
(8)	Δθ1pave	0.03764	0.03764	0.03764	0.04607
(9)	vMp	81.61	81.61	81.61	94.66
(10)	vMpave	77.28	72.95	77.28	85.91
(11)	ΔθMp	0.02952	0.02952	0.02952	0.04576
(12)	ΔθMpave	0.02420	0.01889	0.02420	0.03392
(13)	N1n	1.881	1.910	1.910	1.620
(14)	v2p	22.64	22.50	22.50	20.36
(15)	Δθ2p	0.02359	0.02406	0.01626	0.03069
(16)	v2n	94.66	94.66	94.66	95.10
(17)	Δθ2n	0.04576	0.04576	0.04576	0.04607
(18)	βEt	3.383	3.321	3.248	3.081
(19)	fMp/(fw × ft)1/2	0.284	0.286	0.326	0.300
(20)	|β2t|	3.695	2.420	2.453	2.543
(21)	|fis/fisr|	0.674	0.585	0.604	0.639
(22)	D1n/(ft/FNot)	0.033	0.035	0.033	0.025
(23)	(fMw × fMt)1/2/(fw × ft)1/2	0.206	0.209	0.228	0.211
(24)	|f2|/fPA	0.796	0.766	0.695	0.598
(25)	TLt/ft	0.555	0.585	0.576	0.567
(26)	|fE|/ft	0.048	0.051	0.053	0.062
(27)	β2t/β2w	6.265	4.704	5.293	4.394
(28)	βPArt	2.191	1.986	1.851	1.591
(29)	f1/(fw × ft)1/2	0.699	0.715	0.768	0.614
(30)	|f2|/fw	0.440	0.425	0.492	0.348
(31)	ffp/|ffn|	1.815	1.891	2.119	1.883
(32)	f1/|f2|	3.086	3.269	3.385	3.425
(33)	|f2|/(fw × ft)1/2	0.226	0.219	0.227	0.179
(34)	fPA/(fw × ft)1/2	0.284	0.286	0.326	0.300
(35)	|fE|/(fw × ft)1/2	0.094	0.098	0.116	0.120
(36)	|ff|/(fw × ft)1/2	0.244	0.279	0.335	0.280
(37)	|fis|/(fw × ft)1/2	0.076	0.081	0.091	0.102
(38)	DMnp/(RMnpf + RMnpr)	0.000	0.000	0.000	0.018
(39)	DEnp/(REnpf + REnpr)	−0.172	−0.135	−0.172	−0.093

Although the zoom lenses of Examples 1 to 20 each are configured to have a small size, the focal length at the telephoto end is equal to or greater than 480, and the focal length at the telephoto end in some examples is equal to or greater than 550. Therefore, an increase in focal length can be achieved. In the zoom lenses of Examples 1 to 20, the total angle of view is equal to or less than 3.2° at the telephoto end. In some examples, the total angle of view at the telephoto end is equal to or less than 2.8°. The zoom lenses are optical systems which are suitable for a telephoto type. Further, the zoom lenses of Examples 1 to 20 each ensure a zoom ratio of 2.8 or more, and the zoom lenses of some examples each ensure a zoom ratio of 3.5 or more. In each of the zoom lenses of Examples 1 to 20, various aberrations are satisfactorily corrected, and high optical performance is maintained.

In a lens system used for an imaging apparatus such as a digital camera, a lens system having a narrower angle of view is required in order to capture an image of a distant subject in an enlarged manner. In general, in a case where an attempt is made to narrow the angle of view, the total length of the optical system becomes long, and the size thereof tends to be larger. However, Examples 1 to 20 each realize a super-telephoto zoom lens having a narrow angle of view and a long focal length at the telephoto end while maintaining a small configuration.

Next, an imaging apparatus according to an embodiment of the present disclosure will be described. FIGS. 43 and 44 are external views of a camera 30 which is the imaging apparatus according to the embodiment of the present disclosure. FIG. 43 is a perspective view of the camera 30 viewed from a front side, and FIG. 44 is a perspective view of the camera 30 viewed from a rear side. The camera 30 is a so-called mirrorless type digital camera, and an interchangeable lens 20 can be removably attached thereto. The interchangeable lens 20 is configured to include a zoom lens 1, which is housed in a lens barrel, according to an embodiment of the present disclosure.

The camera 30 comprises a camera body 31, and a shutter button 32 and a power button 33 are provided on an upper surface of the camera body 31. Further, an operating part 34, an operating part 35, and a display unit 36 are provided on a rear surface of the camera body 31. The display unit 36 is able to display a captured image and an image within an angle of view before imaging.

An imaging aperture, through which light from an imaging target is incident, is provided at a center on a front surface of the camera body 31. A mount 37 is provided at a position corresponding to the imaging aperture. The interchangeable lens 20 is mounted on the camera body 31 with the mount 37 interposed therebetween.

In the camera body 31, there are provided an imaging element, a signal processing circuit, a storage medium, and the like. The imaging element such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) outputs a captured image signal based on a subject image which is formed through the interchangeable lens 20. The signal processing circuit generates an image through processing of the captured image signal which is output from the imaging element. The storage medium stores the generated image. The camera 30 is able to capture a still image or a video in a case where the shutter button 32 is pressed, and is able to store image data, which is obtained through imaging, in the storage medium.

The technique of the present disclosure has been hitherto described through embodiments and examples, but the technique of the present disclosure is not limited to the above-mentioned embodiments and examples, and may be modified into various forms. For example, values such as the curvature radius, the surface spacing, the refractive index, the Abbe number, and the aspherical coefficient of each lens are not limited to the values shown in the examples, and different values may be used therefor.

Further, the imaging apparatus according to the embodiment of the present disclosure is not limited to the above example, and may be modified into various forms such as a camera other than the mirrorless type, a film camera, and a video camera.

Claims

1. A zoom lens consisting of, in order from an object side to an image side: a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; a middle group that includes one or more lens groups; and a final lens group, wherein the middle group has a positive refractive power as a whole throughout an entire zoom range,during zooming, a spacing between the first lens group and the second lens group changes, a spacing between the second lens group and the middle group changes, and a spacing between the middle group and the final lens group changes,in a case where the middle group includes a plurality of lens groups, all spacings of adjacent lens groups in the middle group change during zooming, andassuming that a maximum image height is IH, anda focal length of the zoom lens in a state in which an infinite distance object is in focus at a telephoto end is ft,Conditional Expression (1) is satisfied, which is represented by 0.011<IH/ft<0.042   (1).

2. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power.

3. The zoom lens according to claim 1, wherein the final lens group has a negative refractive power.

4. The zoom lens according to claim 1, wherein the first lens group remains stationary with respect to an image plane during zooming.

5. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power, andin a case where a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, the zoom lens includes a stop closer to the image side than a lens disposed closest to the image side in the PA lens group.

6. The zoom lens according to claim 1, wherein assuming that a distance on an optical axis from a lens surface closest to the object side in the first lens group to a lens surface closest to the image side in the first lens group is DG1, Conditional Expression (2) is satisfied, which is represented by 0.6<DG1/IH<2.5   (2).

7. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power, andin a case where a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, the zoom lens includes at least one focusing group that moves along an optical axis during focusing, at a position closer to the image side than a lens disposed closest to the image side in the PA lens group.

8. The zoom lens according to claim 7, wherein assuming that a lateral magnification of the focusing group in a state in which the infinite distance object is in focus at the telephoto end is βft,a combined lateral magnification of all lenses closer to the image side than the focusing group in a state in which the infinite distance object is in focus at the telephoto end is βfrt,βfrt=1 in a case where the lens is not disposed closer to the image side than the focusing group,B is defined to be represented by B=|(1−βft2)×βfrt2|, andB in the focusing group in which B is a maximum value among the focusing groups included in the zoom lens is Bm in a case where the zoom lens includes a plurality of the focusing groups, and B=Bm in a case where the zoom lens includes only one focusing group,Conditional Expression (3) is satisfied, which is represented by 3.5<Bm<10   (3).

9. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power, andin a case where a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, the zoom lens includes a vibration-proof group that moves in a direction intersecting with an optical axis during image blur correction, at a position closer to the image side than a lens disposed closest to the image side in the PA lens group.

10. The zoom lens according to claim 9, wherein assuming that a lateral magnification of the vibration-proof group in a state in which the infinite distance object is in focus at the telephoto end is βist,a combined lateral magnification of all lenses closer to the image side than the vibration-proof group in a state in which the infinite distance object is in focus at the telephoto end is βisrt, andβisrt=1 in a case where the lens is not disposed closer to the image side than the vibration-proof group,Conditional Expression (4) is satisfied, which is represented by 1.7<|(1−(βist)×βisr|<4.8   (4).

11. The zoom lens according to claim 9, wherein the vibration-proof group consists of one positive lens and two negative lenses.

12. The zoom lens according to claim 1, wherein assuming that an Abbe number of a positive lens of the first lens group based on a d line is ν1p, the zoom lens includes at least one positive lens satisfying Conditional Expression (5), which is represented by 81.7<ν1p<105   (5).

13. The zoom lens according to claim 1, wherein assuming that an average value of Abbe numbers of all positive lenses of the first lens group based on a d line is ν1pave, Conditional Expression (6) is satisfied, which is represented by 81.7<ν1pave<105   (6).

14. The zoom lens according to claim 1, wherein assuming that an Abbe number of a positive lens of the first lens group based on a d line is ν1p and a partial dispersion ratio thereof between a g line and an F line is θ1p, and Δθ1p=θ1p+0.00162×ν1p−0.64159,the zoom lens includes at least one positive lens satisfying Conditional Expression (7), which is represented by 0.03<Δθ1p<0.06 (7).

15. The zoom lens according to claim 1, wherein assuming that an Abbe number of a positive lens of the first lens group based on a d line is ν1p and a partial dispersion ratio thereof between a g line and an F line is θ1p, Δθ1p=θ1p+0.00162×ν1p−0.64159, andan average value of Δθ1p of all positive lenses of the first lens group is Δθ1pave, Conditional Expression (8) is satisfied, which is represented by 0.03<Δθ1pave<0.06   (8).

16. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power, andassuming that an Abbe number of a positive lens disposed in a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group based on a d line is νMp, the zoom lens includes at least one positive lens satisfying Conditional Expression (9), which is represented by 81.7<νMp<105   (9).

17. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power, andassuming that an average value of Abbe numbers of all positive lenses disposed in a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group based on a d line is νMpave, Conditional Expression (10) is satisfied, which is represented by 81.7<νMpave<105   (10).

18. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power, andassuming that an Abbe number of a positive lens disposed in a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group based on a d line is νMp and a partial dispersion ratio thereof between a g line and an F line is θMp, and ΔθMp=θMp+0.00162×νMp−0.64159,the zoom lens includes at least one positive lens satisfying Conditional Expression (11), which is represented by 0.014<ΔθMp<0.06   (11).

19. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power, andassuming that an Abbe number of a positive lens disposed in a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group based on a d line is νMp and a partial dispersion ratio thereof between a g line and an F line is θMp, ΔθMp=θMp+0.00162×νMp−0.64159, andan average value of ΔθMp of all positive lenses of a lens group that has a strongest refractive power among the lens groups that have positive refractive powers and that are included in the middle group is ΔθMpave,Conditional Expression (12) is satisfied, which is represented by 0.014<ΔθMpave<0.06   (12).

20. The zoom lens according to claim 1, wherein the first lens group includes at least one negative lens, and assuming that a refractive index of a negative lens of the first lens group at a d line is N1n, the zoom lens includes at least one negative lens satisfying Conditional Expression (13), which is represented by 1.55<N1n<1.8   (13).

21. The zoom lens according to claim 1, wherein the second lens group includes at least one positive lens, andassuming that an Abbe number of the positive lens of the second lens group based on a d line is ν2p, the zoom lens includes at least one positive lens satisfying Conditional Expression (14), which is represented by 15<ν2p<25   (14).

22. The zoom lens according to claim 1, wherein the second lens group includes at least one positive lens, andassuming that an Abbe number of a positive lens of the second lens group based on a d line is ν2p and a partial dispersion ratio thereof between a g line and an F line is θ2p, and Δθ2p=θ2p+0.00162×ν2p−0.64159,the zoom lens includes at least one positive lens satisfying Conditional Expression (15), which is represented by 0.015<Δθ2p<0.06   (15).

23. The zoom lens according to claim 1, wherein assuming that an Abbe number of a negative lens of the second lens group based on a d line is ν2n, the zoom lens includes at least one negative lens satisfying Conditional Expression (16), which is represented by 70<ν2n<105   (16).

24. The zoom lens according to claim 1, wherein assuming that an Abbe number of a negative lens of the second lens group based on a d line is ν2n and a partial dispersion ratio thereof between a g line and an F line is θ2n, and Δθ2n=θ2n+0.00162×ν2n−0.64159,the zoom lens includes at least one negative lens satisfying Conditional Expression (17), which is represented by 0.03<Δθ2n<0.06   (17).

25. The zoom lens according to claim 1, wherein assuming that a lateral magnification of the final lens group in a state in which the infinite distance object is in focus at the telephoto end is βEt, Conditional Expression (18) is satisfied, which is represented by 1.4<βEt<4.7   (18).

26. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power, andassuming that a focal length of a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group is fMp, anda focal length of the zoom lens in a state in which the infinite distance object is in focus at a wide angle end is fw,Conditional Expression (19) is satisfied, which is represented by 0.1<fMp/(fw×ft)1/2<0.7   (19).

27. The zoom lens according to claim 1, wherein assuming that a lateral magnification of the second lens group in a state in which the infinite distance object is in focus at the telephoto end is β2t, Conditional Expression (20) is satisfied, which is represented by 0.9<|β2t|<4.6   (20).

28. The zoom lens according to claim 1, wherein the zoom lens includes a vibration-proof group that moves in a direction intersecting with an optical axis during image blur correction,the zoom lens includes a stationary group that is disposed adjacent to the vibration-proof group on the image side of the vibration-proof group, that has a refractive power of which a sign is opposite to a sign of a refractive power of the vibration-proof group, and that remains stationary with respect to an image plane during zooming and focusing, andassuming that a focal length of the vibration-proof group is fis, anda focal length of the stationary group is fisr,Conditional Expression (21) is satisfied, which is represented by 0.32<|fis/fis|<1.1   (21).

29. The zoom lens according to claim 1, wherein the first lens group includes at least one negative lens, andassuming that a center thickness of a negative lens disposed closest to the object side among negative lenses included in the first lens group is D1n, andan F number in a state in which the infinite distance object is in focus at the telephoto end is FNot,Conditional Expression (22) is satisfied, which is represented by 0.01<D1n/(ft/FNot)<0.04   (22).

30. The zoom lens according to claim 1, wherein a single lens that has a negative refractive power is disposed closest to the object side in the first lens group.

31. The zoom lens according to claim 1, wherein assuming that a focal length of the middle group in a state in which the infinite distance object is in focus at a wide angle end is fMw,a focal length of the middle group in a state in which the infinite distance object is in focus at the telephoto end is fMt, anda focal length of the zoom lens in a state in which the infinite distance object is in focus at the wide angle end is fw,Conditional Expression (23) is satisfied, which is represented by 0.16<(fMw×fMt)1/2/(fw×ft)1/2<0.3   (23).

32. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power,a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, andassuming that a focal length of the PA lens group is fPA, anda focal length of the second lens group is f2,Conditional Expression (24) is satisfied, which is represented by 0.25<|f2|/fPA<3   (24).

33. The zoom lens according to claim 1, wherein the final lens group remains stationary with respect to an image plane during zooming.

34. The zoom lens according to claim 1, wherein the second lens group and all lens groups in the middle group move during zooming.

35. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power,in a case where a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, a lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group is the PA lens group.

36. The zoom lens according to claim 1, wherein assuming that a sum of a back focal length of the zoom lens at an air-equivalent distance and a distance on an optical axis from a lens surface closest to the object side in the first lens group to a lens surface closest to the image side in the final lens group in a state in which the infinite distance object is in focus at the telephoto end is TLt, Conditional Expression (25) is satisfied, which is represented by 0.42<TLt/ft<0.94   (25).

37. The zoom lens according to claim 1, wherein the first lens group includes, in order from the object side to the image side, a negative lens, a positive lens, and a positive lens.

38. The zoom lens according to claim 1, wherein the first lens group consists of, in order from the object side to the image side, a negative lens, a positive lens, and a positive lens.

39. The zoom lens according to claim 1, wherein the zoom lens includes at least one focusing group that moves along an optical axis during focusing, andthe at least one focusing group consists of two or fewer lenses.

40. The zoom lens according to claim 1, wherein assuming that a focal length of the final lens group is fE, Conditional Expression (26) is satisfied, which is represented by 0.02<|fE|/ft<0.2   (26).

41. The zoom lens according to claim 1, wherein the zoom lens includes at least one focusing group that moves along an optical axis during focusing, andthe at least one focusing group has a negative refractive power.

42. The zoom lens according to claim 1, wherein the zoom lens includes a vibration-proof group that moves in a direction intersecting with an optical axis during image blur correction, andthe vibration-proof group has a negative refractive power.

43. The zoom lens according to claim 1, wherein the middle group includes at least two lens groups that have positive refractive powers.

44. The zoom lens according to claim 1, wherein all of lens groups included in the middle group are lens groups that have positive refractive powers.

45. The zoom lens according to claim 1, wherein in the final lens group, at least one focusing group that moves along an optical axis during focusing and a vibration-proof group that moves in a direction intersecting with the optical axis during image blur correction are disposed.

46. The zoom lens according to claim 45, wherein the at least one focusing group is disposed closer to the object side than the vibration-proof group.

47. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power, anda lens group that has a strongest refractive power among lens groups that have positive refractive powers and that are included in the middle group includes at least three positive lenses and at least one negative lens.

48. The zoom lens according to claim 1, wherein assuming that a lateral magnification of the second lens group in a state in which the infinite distance object is in focus at the telephoto end is β2t, anda lateral magnification of the second lens group in a state in which the infinite distance object is in focus at a wide angle end is β2w,Conditional Expression (27) is satisfied, which is represented by 2.5<β2t/β2w<7.9   (27).

49. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power,a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, andassuming that a combined lateral magnification of all lenses closer to the image side than the PA lens group in a state in which the infinite distance object is in focus at the telephoto end is βPArt, Conditional Expression (28) is satisfied, which is represented by 0.8<βPArt<4.5   (28).

50. The zoom lens according to claim 1, wherein assuming that a focal length of the first lens group is f1, anda focal length of the zoom lens in a state in which the infinite distance object is in focus at a wide angle end is fw,Conditional Expression (29) is satisfied, which is represented by 0.43<f1/(fw×ft)1/2<1.03   (29).

51. The zoom lens according to claim 1, wherein assuming that a focal length of the second lens group is f2, anda focal length of the zoom lens in a state in which the infinite distance object is in focus at a wide angle end is fw,Conditional Expression (30) is satisfied, which is represented by 0.23<|f2|/fw<0.66   (30).

52. The zoom lens according to claim 1, wherein the zoom lens includes at least one focusing group that moves along an optical axis during focusing,the at least one focusing group consists of one negative lens and one positive lens, andassuming that a focal length of the positive lens of the focusing group consisting of one negative lens and one positive lens is ffp, anda focal length of the negative lens of the focusing group consisting of one negative lens and one positive lens is ffn,Conditional Expression (31) is satisfied, which is represented by 0.9<ffp/|ffn|<2.8   (31).

53. The zoom lens according to claim 1, wherein assuming that a focal length of the first lens group is f1, anda focal length of the second lens group is f2,Conditional Expression (32) is satisfied, which is represented by 2.1<f1/|f2|<4.8   (32).

54. The zoom lens according to claim 1, wherein assuming that a focal length of the second lens group is f2, anda focal length of the zoom lens in a state in which the infinite distance object is in focus at a wide angle end is fw,Conditional Expression (33) is satisfied, which is represented by 0.13<|f2|/(fw×ft)1/2<0.32 (33).

55. The zoom lens according to claim 1, wherein the middle group includes at least one lens group that has a positive refractive power,a lens group disposed closest to the object side is a PA lens group among lens groups that have positive refractive powers and that are included in the middle group, andassuming that a focal length of the PA lens group is fPA, anda focal length of the zoom lens in a state in which the infinite distance object is in focus at a wide angle end is fw,Conditional Expression (34) is satisfied, which is represented by 0.12<fPA/(fw×ft)1/2<0.45   (34).

56. The zoom lens according to claim 1, wherein assuming that a focal length of the final lens group is fE, anda focal length of the zoom lens in a state in which the infinite distance object is in focus at a wide angle end is fw,Conditional Expression (35) is satisfied, which is represented by 0.06<|fE|/(fw×ft)1/2<0.25   (35).

57. The zoom lens according to claim 1, wherein the zoom lens includes at least one focusing group that moves along an optical axis during focusing, andassuming that a focal length of the focusing group is ff, anda focal length of the zoom lens in a state in which the infinite distance object is in focus at a wide angle end is fw,the zoom lens includes at least one focusing group satisfying Conditional Expression (36), which is represented by 0.14<|ff|/(fw×ft)1/2<0.7   (36).

58. The zoom lens according to claim 1, wherein the zoom lens includes a vibration-proof group that moves in a direction intersecting with an optical axis during image blur correction, andassuming that a focal length of the vibration-proof group is fis, anda focal length of the zoom lens in a state in which the infinite distance object is in focus at a wide angle end is fw,Conditional Expression (37) is satisfied, which is represented by 0.05<|fis|/(fw×ft)1/2<0.15   (37).

59. The zoom lens according to claim 1, wherein the middle group includes a lens pair consisting of a negative lens and a positive lens that are adjacent to each other with an air spacing interposed therebetween, andassuming that a spacing on an optical axis of the air spacing in the lens pair of the middle group is DMnp,a curvature radius of an object side surface of an air lens formed by the air spacing in the lens pair of the middle group is RMnpf, anda curvature radius of an image side surface of the air lens formed by the air spacing in the lens pair of the middle group is RMnpr,the zoom lens includes at least one lens pair satisfying Conditional Expression (38), which is represented by 0.002<DMnp/(RMnpf+RMnpr)<0.1   (38).

60. The zoom lens according to claim 1, wherein the final lens group includes a lens pair consisting of a negative lens and a positive lens that are adjacent to each other with an air spacing interposed therebetween, andassuming that a spacing on an optical axis of the air spacing in the lens pair of the final lens group is DEnp,a curvature radius of an object side surface of an air lens formed by the air spacing in the lens pair of the final lens group is REnpf, anda curvature radius of an image side surface of the air lens formed by the air spacing in the lens pair of the final lens group is REnpr,the zoom lens includes at least one lens pair satisfying Conditional Expression (39), which is represented by −0.5<DEnp/(REnpf+REnpr)<−0.01   (39).

61. The zoom lens according to claim 1, wherein Conditional Expression (1-1) is satisfied, which is represented by 0.017<IH/ft<0.036   (1-1).

62. The zoom lens according to claim 6, wherein Conditional Expression (2-1) is satisfied, which is represented by 0.7<DG1/IH<2.2   (2-1).

63. The zoom lens according to claim 8, wherein Conditional Expression (3-1) is satisfied, which is represented by 3.8<Bm<9.4   (3-1).

64. An imaging apparatus comprising the zoom lens according to claim 1.