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 with respect to the page;
FIG. 2 is a left side view of the base with the bottom oriented downward;
FIG. 3 is a right view of the base with the bottom oriented downward;
FIG. 4 is a front view of the base with the bottom oriented downward, the rear view being a mirror image thereof;
FIG. 5 is a top view of the base with the left side oriented downward;
FIG. 6 is a bottom view of the base with the right side oriented downward;
FIG. 7 is a perspective view of the base showing the left side, the top, and the front of the base, a camera mount coupled to the left side of the base, the camera mount obscuring a portion of the left side; and,
FIG. 8 is a perspective view of the base coupled to a cap, the perspective view showing the front, the left side, and the top of the base, the left side of the base coupled to a camera mount and the camera mount coupled to a camera, the camera mount obscuring a portion of the left side and the cap obscuring a portion of the top.
The dashed lines in the drawing show structure of the environment and form no part of the claimed design.