Olympus Lens to Canon EOS EF Mount Adapter for Canon EOS 1D, 1DS, Mark II, III, IV, 1DC, 1DX, D30, D60, 10D, 20D, 20DA, 30D, 40D, 50D, 60D, 60DA, 5D, Mark II, Mark III, 7D, Rebel XT, XTi, XSi, T1, T1i, T2i, T3, T3i, T4, T4i Made of copper. Smooth surface for effortless mount This adapter ring allows you to attach any Olympus OM lenses or accessories to any Canon EOS camera.