Vello Lens Mount Adapter - Canon FD Lens to Canon EOS Camera
TheCanon EOS To Canon FD Lens AdapterfromVellolets you mount a Canon FD lens to a Canon EOS camera. The lens adapter is easy to mount and unmount yet won't fall off when attached to the lens and camera. The adapter increases the focal length by 1.25x and reduces the lens aperature by 1 f/stop