FIG. 1 is a perspective view of the concave photo frame;
FIG. 2 is a front elevational view of the concave photo frame;
FIG. 3 is a left side elevational view of the concave photo frame;
FIG. 4 is a right side elevational view of the concave photo frame;
FIG. 5 is a top plan view of the concave photo frame;
FIG. 6 is a bottom plan view of the concave photo frame; and,
FIG. 7 is a back elevational view of the concave photo frame.
The broken lines are for illustrative purposes only and form no part of the claimed design.