A simple and convenient method for shortening your minimum focusing distance and minimum working distance, this Macro Filter Kit from Lensbaby fits lenses with 46mm filter threads, and enables you to photograph close-up subjects more effectively. This kit is comprised of +1, +2, and +4 dioptric strength lenses, and each of the lenses can be used to vary the degree of how much the minimum focusing distance of the lens is reduced. Additionally, front 46mm filter threads also allow the close-up lenses to be combined for even greater magnifications.