FD to RF Mount Adapter, allows Cannon FD Fl FDn lens to fit on EOS RF Mount Mirrorless Cameras Infinity Focus Guaranteed. Copper Lens Mount, Solid and Durable Pls Note: Adapter does NOT compatible with Cannon EF / Efs Mount DSLRs There is no electrical contacts in the adapter ring. Exposure and focus has to be adjusted manually. Automatic diaphragm, auto-focusing, or any other functions will not operated with using this adapter. FD EOS R Adapter, FD to RF, compatible with Canon EOS R Mirrorless Camera EOS R RP Ra R3 R5 R6 R7 R10