Allow to use Olympus OM lens on EF system digital and film SLR cameras. There are no electrical contacts in the adapter ring, exposure and focus has to be adjusted manually. Made of brass and aluminum (not plastic), with precise design and high technology. Work with 6D 5D Mark III II 7D 60D 50D 40D 700D 650D 600D 550D 500D 450D 400D 350D Rebel T4i T4 T3i T3 T2i T2 SL1. Please note: Infinity focus position：the 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.