A simple and convenient method for shortening your minimum focusing distance and minimum working distance, this Close Up Macro Lens Kit from Vivitar fits lenses with 37mm filter threads, and enables you to photograph close-up subjects more effectively. This kit is comprised of +1, +2, +4, and +10 dioptric strength lenses, and also includes a protective filter wallet for storage or travel. Each of the lenses can be used to vary the degree of how much the minimum focusing distance of the lens is reduced.