The ornamental design for a base for a camera mount, as shown and described.
FIG. 1 is a top, front and left side perspective view of a base for a camera mount showing our new design, with the bottom of the base oriented downward toward the figure number;
FIG. 2 is a front view of the base for a camera mount with the bottom oriented downward with respect to the page;
FIG. 3 is a rear view of the base for a camera mount with the bottom of the base oriented downward;
FIG. 4 is a left view of the base for a camera mount with the bottom oriented downward, the right view being a mirror image thereof;
FIG. 5 is a top view of the base for a camera mount with the rear oriented downward;
FIG. 6 is a bottom view of the base for a camera mount with the rear oriented downward;
FIG. 7 is a perspective view of the base for a camera mount coupled to an epaulet, the perspective view showing the top, and the front of the base for a camera mount, the left side of the base coupled to a camera mount and obscured by the camera mount, the camera mount coupled to a camera; and,
FIG. 8 is a perspective view of the base for a camera mount coupled to another epaulet, the perspective view showing the top, and the front of the base for a camera mount, the left side of the base coupled to a camera mount and obscured by the camera mount, the camera mount coupled to a camera.
The dashed lines in the drawing show environment structure and form no part of the claimed design.