Adapter is new and never been used. You could use this reverse adapter to obtain close focus (macro) shoots with any lens that has 49mm rim (such as EF 50mm f/1.8 STM) This adapter allows you reversely attach a 49mm filter threaded with your Canon EOS EF-M mirrorless (it will not fit Canon EOS R or EF series SLR cameras) digital cameras. Please make sure that you have mirrorless camera or this adapter will not fit. Automatic diaphragm, auto-focusing, or any other automatic feature will not operate while using this adapter. This is an all manual adapter. You only can focus on manual mode. Aperture could be controlled on the lens itself (if it has aperture ring only). Material: aluminum alloy (not plastic) Color : black Compatibility: Canon EOS M mirrorless digital cameras.