1.Support EXIF Information Transmitting: The gold-plated contatcs pin design greatly improves its conductivity and achieves EXIF INFO; After connected to the Can0n lens, you can see the relevant parameter, such as aperture, shutter speed, exposure parameters, etc. Transmitting function perfectly makes lens compatible with camera.2.Support Auto-focus Function: Strong stability, fast, smooth auto focus performance reveals the powerful connection technology, quickly adjust the aperture, shutter, ISO and other settings, perfect control your lens.3.Electronic Aperture Control: Adjust the aperture quickly and effectively by controlling lens connected with mount adapter through the R camera body side, great convenience in use.4.Support IS Image Stabilization Function: Support lens image stabilization function for lens which effectilvely eliminate image ghosting or blurring caused by motion or camera body shake.5.Gold-plated Contact, Detachable 1/4 Inch Tripod Foot: The lens mount adapter utilizes gold plated electronic contact design which highly enhance the data transmitting performance between lens and camera body. Additionally, the mount lens adapter can be applied flexibly to telephoto lens machanical load bearing for its 1/4 inch detachable tripod foot at the bottom to protect the lens and camera body contacts.Made of Aluminum Alloy, Powerful and Stable: With aluminum alloy material and CNC technology, connect the lens without deformation and bending, it is precise, stable owns top quality.Brand: Model: CM-EF- RCompatible Cameras: For RF-mount camerasCompatible Lenses: For EF/EF-S series lensesTripod Screw: 1/4 inch threadCamera-mount Diameter: 50mmLens-mount Outer Diameter: 65mmMaterial:Aluminum alloycolour:blackPackage Contents:1 * CM-EF- R Lens Mount Adapter1 * User Manual (English & Chinese)Only the above package content, other products are not included.Note: Light 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.