The K&F CONCEPT FD-EOS R mount adapter provides a stable connection with a locking function. The lens mount is FD, and the camera mount is EOS R (mirrorless). - Model: FD-EOS R - Brand: K&F CONCEPT - Features: Lock/Open function - Color: Black - Accessories: Rear cap (for RF mount) I was enthusiastic about taking photos with old lenses on my mirrorless camera, but I haven't had much opportunity to use it, so I've decided to sell it. By the way, I've already sold the old lens (FD 35-70mm f/3.5-4.5). Thank you for looking.