The Close-Up Filter Kit (+1, +2, +4, +10) is a set of 4 close-up lenses for use in achieving macro-
like results with almost any lens you pair them with. Close-up lenses are essentially diopters that you place
over your lens in order to lessen the minimum focus distance by the amount specified on the filter. You can
combine the filters together to increase their strength & to fine tune your close-up settings.