• 1. These close-up filters are ideal for shooting small items, focusing on coins, flowers, gems and insects, industrial photography with small components, medical and dental laboratory work and other scientific photography • 2. This macro filter set consists of four close-up filters that allow photographers to achieve professional results at a low price • 3.Made of high quality optical magnifier which can reduce the focal length of the lens • 4. Filters have four different strengths +1, +2, +4, +10 • Material: optical glass and aluminum