The ornamental design for a camera, as shown and described.
FIG. 1 is a front elevational view of a first embodiment of a camera showing my new design;
FIG. 2 is a top, front and right side perspective view thereof; and
FIG. 3 is a bottom, front and left side perspective view thereof.
FIG. 4 is a front elevational view of a second embodiment of a camera showing my new design;
FIG. 5 is a top, front and right side perspective view thereof; and,
FIG. 6 is a bottom, front and left side perspective view thereof.
The broken lines depict portions of the camera in which the design is embodied that form no part of the claimed design. The dot-dash broken lines defining the boundaries of the claimed design form no part of the claimed design.