The FD lenses are sought after because they are a totally dead line. Canon flipped to the EF mount some time ago, so they don't fit anything without an adapter. Due to this, they are quite cheap, so kids are using them on their Olympus PEN slr hybrid cameras. And something to do with focusing as well

Quote Originally Posted by trublubiker View Post
Strangely enough the better FD mount lens are now being highly sought after, thanks to adaptors to mount them on almost anything.

Cheers

Kevin