K&F Concept Pro Lens Mount Adapter for Canon FD FL Lens to Canon EOS Camera, for Canon 1D, 1DS, Mark II, III, IV, Digital Rebel T5i, T4i, T3i, T3 Mounts Canon FD & FL 35mm SLR lenses to Canon EOS (EF, EF-S) Mount SLR Cameras; infinity focus or beyond guaranteed Built-in multi-coated focusing correction lens.Supports manual control, manual focus, manual exposure. Please note: It is not same between Canon FD mount and EF mount, this fd to ef adapter ring is only for Canon FD mount lens, please contact us if you want to purchase for Canon EF mount lens. Compatible Cameras (including, but not limited to): 1d/1ds, Mark II, III, IV, X, C, 5D, 5D Mark II/III 7D, 10D, 20D, 30D, 40D, 50D, 60D, 60Da, Rebel xt, xti, xs, xsi, t1i, T2i, T3, T3i, T4, 300D, 350D, 400D, 450D, 500D, 550D, 1000D. Please note: Infinity focus positionthe position of the infinity mark of the telephoto lens or super telephoto lens is shifted slightly to the positive side to enable focus adjustment even when focus shift is caused due to temperature changes.The shift range is denoted by an L-shaped line, Be sure to check the focus through the viewfinder even when you shoot at infinity.