The Hoya MACRO CLOSE-UP is a lens consisting of a 2-element, 2-group construction, and a +10 diopter rating. Resolution is outstanding and focusing is possible at 10cm or less depending on the lens it is used with. This close focusing distance allows for super close-ups of insects, flowers and other small objects. The magnification is about 1:2 with a 50mm standard lens (35mm camera), roughly equivalents to a 100mm telephoto lens. The lens should be stopped down as much as possible to get maximum depth-of-field. The MACRO CLOSE-UP is available in 3 sizes, 49mm, 52mm, and 55mm.