This is a mount adapter for connecting Canon EF lenses (for SLR cameras) to EOS R bodies (mirrorless cameras). - Brand: Canon - Model Name: Mount Adapter EF-EOS R - Color: Black - Features: Allows EF lenses to be attached to EOS R bodies 【Key Features】 A dedicated mount adapter for the EOS R system. A standard type with a lightweight design of approximately 110g. EF lenses such as super-telephoto, telephoto, wide-angle, macro, and TS-E lenses can be attached. Functions of the lens, such as autofocus, image stabilization, control via the camera's electronic dial, and optical correction, can be used almost as they are. ・Manufacturer's product page https://personal.canon.jp/product/camera/rf/adp-ef-eosr -------------------- ※This is a used item, but it is in good condition. I have actually used it, so its operation has been confirmed. The AF (autofocus) speed is very convenient, with no difference from when using RF lenses. This is the perfect item for those who want to make effective use of EF lenses. I am selling it because I purchased a higher-end model. ※As shown in the photos, the main body and front and rear caps are included. (There is no box.) <The EF lenses shown in the photos are for illustrative purposes and are not included.> Please consider purchasing.