NGO Close Up Filters (4 Filters + Pouch + Cleaning Kit)TheClose Up Filter Kit fromNGOconsists of four filters: +1 +2 +4 +8PLUS FREE CLEANING KIT (Lens Cleaning Pen, Air Blower & 6.5" x 6.5" Microfiber Cloth) TheNGO Close-Up Filter Kitis a set of four 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 and to fine tune your close-up settings.These filters decrease the minimum focus distance of any lens, providing macro-like results. The +1, +2, +4 and +8 strengths allow you to vary and modify your desired close-up amount. Dual threading permits you to combine the filters together or pair with other types of filters.