The ornamental design for a lenscover, as shown and described.
FIG. 1 is a front, bottom and left side perspective view of a lens cover showing our new design;
FIG. 2 is a rear, top and right side perspective view thereof;
FIG. 3 is a rear and left side perspective view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a left side elevational view thereof; and,
FIG. 9 is a right side elevational view thereof.
The broken lines in the drawings showing portions of the lens cover are included for the purpose of illustrating environmental structure and form no part of the claimed design.