1Support 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. 2Support 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. 3Electronic 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. 4Support IS Stabilization Function: Support lens stabilization function for lens which effectilvely eliminate ghosting or blurring caused by motion or camera body shake. 5Gold-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- R Compatible Cameras: For RF-mount cameras Compatible Lenses: For EF/EF-S series lenses Tripod Screw: 1/4 inch thread Camera-mount Diameter: 50mm Lens-mount Outer Diameter: 65mm Material:Aluminum alloy colour:black Package Contents: 1 * CM-EF- R Lens Mount Adapter 1 * 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.