Control of exposure by setting shutters, diaphragms or filters, separately or conjointly

GPHYSICS G03Photography G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES ACCESSORIES THEREFOR

G03B7/00Control of exposure by setting shutters, diaphragms or filters, separately or conjointly

G03B7/003setting of both shutter and diaphragm G03B7/006setting of both diaphragm and distance G03B7/01with selection of either manual or automatic mode G03B7/02Control effected by setting a graduated member on the camera in accordance with indication or reading afforded by a light meter, which may be either separate from or built into camera body G03B7/04Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device G03B7/06by a follow-up movement of an associated reference mark to the pointer G03B7/08Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device G03B7/0805Setting of priority modes G03B7/0807Control circuits G03B7/081Analogue circuits G03B7/083for control of exposure time G03B7/085for control of aperture G03B7/087for control of both exposure time and aperture G03B7/089for storage of exposure value in mirror reflex cameras G03B7/091Digital circuits G03B7/093for control of exposure time G03B7/095for control of aperture G03B7/097for control of both exposure time and aperture G03B7/099Arrangement of photoelectric elements in or on the camera G03B7/09908on the camera or in the objective G03B7/0993in the camera G03B7/0997Through the lens [TTL] measuring G03B7/09971in mirror-reflex cameras G03B7/09972using the mirror as sensor light reflecting or transmitting member G03B7/09973using the mirror as sensor G03B7/09974using the film or shutter as sensor light reflecting member G03B7/09976the sensor being mounted in, before, or behind the porro-prism G03B7/09977with a movable light-measuring element G03B7/09978Protection against viewer backlight or integration of the viewer light into the measured light G03B7/09979Multi-zone light measuring G03B7/10a servo-motor providing energy to move the setting member G03B7/12a hand-actuated member moved from one position to another providing the energy to move the setting member G03B7/14setting of both shutter and diaphragm aperture being effected so as to give the optimum compromise between depth of field and shortness of exposure G03B7/16in accordance with both the intensity of the flash source and the distance of the flash source from the object G03B7/17Selection of modes in flash units by exposure control arrangements G03B7/18in accordance with light-reducing "factor" of filter or other obturator used with or on the lens of the camera G03B7/20in accordance with change of lens G03B7/22in accordance with temperature or height G03B7/24automatically in accordance with markings or other means indicating film speed or kind of film on the magazine to be inserted in the camera G03B7/26Power supplies Circuitry or arrangement to switch on the power source Circuitry to check the power source voltage G03B7/28Circuitry to measure or to take account of the object contrast G03B7/30Safety arrangements for control of exposure