Offline
I knew there were adaptors for the EF-RF mount (I have one which allows use of my current EF lenses), but I just learned there are also adaptors for FD-RF. I have a few (I think 3 or 4) FD lenses which, with this adaptor, I could use on my R5 camera (RF mount). Of course there are limitations, for example you must manually focus the lens once it has no electronics to communicate with the camera to allow auto focus.