The ornamental design for a lenscap, as shown and described.
FIG. 1 is an isometric view of a lens cap.
FIG. 2 is a front elevation view of the lens cap of FIG. 1.
FIG. 3 is a left side view of the lens cap of FIG. 1.
FIG. 4 is a right side view of the lens cap of FIG. 1.
FIG. 5 is a rear elevation view of the lens cap of FIG. 1.
FIG. 6 is a top view of the lens cap of FIG. 1; and,
FIG. 7 is a bottom view of the lens cap of FIG. 1.
The dot-dash lines denote the boundary of the claim and form no part of the claimed design. The broken lines depict portions of the lens cap in which the design is embodied that form no part of the claimed design.