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. 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 1 x Adapter 2 x Lens Cap 1 x Instruction 1 x Storage Bag