1.1.These close up filters are ideal for photographing small items and focusing in on details of coins, flowers, jewelry and insects, as well as industrial photos of miniaturized components, medical and dental laboratory work and other scientific photography. 2.2.This macro filter set consists of 4 close-up filters allowing the photographer to achieve professional results. 3.3.Made of optical magnifying glass cutting down the close-focusing distance of the lens. 4.4.The filters come in 4 different strengths: +1,+2, +4, +10.Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.