The ornamental design for a lensholder, as shown and described.
FIG. 1 is a perspective view of a lens holder showing our new design in accordance with a first embodiment of the invention;
FIG. 2 is a top view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a right side elevational view thereof
FIG. 5 is a perspective view of a lens holder showing our new design in accordance with a second embodiment of the invention;
FIG. 6 is a top view thereof;
FIG. 7 is a front elevational view thereof; and,
FIG. 8 is a right side elevational view thereof.
Bottom views and left side elevational views of the lens holder are omitted as they are symmetric in appearance to the top views of FIG. 2 and FIG. 6, and the right side elevational views of FIG. 4 and FIG. 8, respectively.