Make for EF mount lenses can be used on M42 screw mount cameras. It supports A / M mode, auto focus (AF) is . Please installing / uninstalling the adapter after turning off the camera. It is just for macro , it can NOT focus to . Suitable for: Lens: for EF Lens. (Doesn't compatible EF 50mm f/1.8 STM, EF 40mm f/2.8 STM) Camera: All M42 screw Mount cameras, such as: for , for , for , for Mamiya, for Zenit Color:Black Material:Plastic+Metal Package Contents: 1 * Macro Ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.