Feature: 1. Built‑in CPL filter, CPL filter can be removed or replaced or taken out without use, and the polarization can be adjusted according to the actual shooting. 2. The built-in filter adopts ultra-thin high-definition polarizer to eliminate reflections, increase texture, emphasize contrast, enhance three-dimensionality, restore colors, and increase saturation. 3. The adapter ring has a built‑in metal mount, the edges are rounded, and adapts camera smoothly. 4. Built-in software function, can record property and shooting data of digital photos, after installation, support the body to view the aperture, shutter, exposure compensation and other information 5. Built‑in metal electronic contacts and data chips. When compatible with the camera body and lens, the camera body can control the lens aperture, which greatly improves the convenience of use. 6. The inner wall of the R adapter ring has flocked and extinction processed, which is more effective than ordinary threaded matting. The front and rear mount are made of metal, and the surface is electroplated, which is durable and does not damage the camera mount. 7. Compatible Lens: For CanonEF/EF‑S Series; Compatible Camera: For Canon R Mount Camera, like for R5/R6/R/RP etc. Specification: Item Type: EF-EOS R Lens Adapter Ring Material: Aluminum Alloy Color: Black Compatible Lens: For CanonEF/EF-S Series Compatible Camera: For Canon R Mount Camera, like for R5/R6/R/RP etc. Focus Type: Auto Max Diameter and Length: Approx. 71.5x31mm/2.8x1.2in Weight: Approx. 225g/7.9oz. Package List: 1 x Adapter2 x Lens Cap1 x Instruction1 x Storage Bag Note: 1. Install the mount adapter ring to the lens and switch the setting from MF mode to AF mode. If auto focus cannot be performed, please reboot the camera.2. Connecting this adapter ring to the lens will not affect the performance of the lens.3. Please use the switch on the lens to set the lens function. If the setting in the camera menu is different from the setting on the lens, please take the latter one as standard.4. When the lens you use is heavier than the camera, be sure to hold the lens when moving the camera and shooting.5. Since the minimum focusing length of the lens will increase when this adapter ring is connected, the maximum magnification and field of view may change.