Features:1.Made of copper, high strength and non-deformation, super smooth surface finishing.2.The lens mount adapter is suitable for YC CY CO/Y lens to mount for EF mirrorless camera body.3.Completely manual control, supports manual focus and manual exposure.4.Allow focusing to infinity.5.Precise thread ensures firm connection between lens and camera body.Specifications:Material: copperColor: As picture shownCompatible Lens: For Contax/Yachica CY/YC mount lensCompatible Camera: For EF Mount mirrorless camera body. Packing List:1xLens adapter ringNote:When using the adapter ring for first time, please turn on the ''No lens release shutter'' option in the body menu, otherwise it will not be recognized.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. .