The ornamental design for a camera, as shown and described.
FIG. 1 is a top, front and right side perspective view of a camera showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is a right side elevational view thereof; and,
FIG. 8 is a cross-sectional view thereof taken along line VIII-VIII of FIG. 2 and a portion defined by an arrow A and an arrow B of FIG. 6, in which an internal structure thereof is not shown.
The broken lines depict portions of the camera in which the design is embodied that form no part of the claimed design.