Thank you for viewing. This is a Leica R mount to Canon EF mount conversion adapter. It's a product of ELEFOTO, a well-known Japanese manufacturer known for its high precision, allowing you to use Leica R lenses on EOS bodies. Made of metal, it has a solid construction, and attaching and detaching is smooth. There are minor signs of use from normal use, but there are no issues with mounting or operation. There are no electronic contacts, so aperture control and focusing are manual. Please also note that we cannot guarantee flange back accuracy due to lens or individual variations. The original box will be folded for shipping due to its size. Please check the condition of the product in the photos. #ELEFOTO #LeicaR #EOS #mountadapter #oldlens #Leica #cameragoods #canon #Canon #summicron #summilux #elmarit