Lens adaptation ring for Canon FD FL 5D Mark II EOS 7D 60D 50D 550D 500D T2i 600D 1000D 1100D DC263 (Electronics)
The small price justifies the guard, if only for one purpose and especially telephoto (I use it with a mirror 500). Indeed, the focus is more than doubled, making it unattractive for a large angle (17 or 28 mm). The development is better for close su