Allow M42 Screw Mount SLR Lenses to (EF, EF-S) Mount SLR Cameras Infinity focus function is allowed Manual adapter,auto diaphragm/auto-focus is not allowed All-metal design; anodized aluminum construction Compatible Cameras: Suitable for (EF, EF-S) Mount SLR Cameras - Popular models include: 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