1. Mounts Canon FD and FL 35mm SLR lenses to Canon EOS (EF, EF-S) mount SLR cameras; infinity focus guaranteed 2. Built-in multi-coated focusing correction lens. Supports manual focus, manual exposure, and manual control 3. Note: Canon FD mount is not the same as EF mount. This FD to EF adapter ring is designed specifically for Canon FD mount lenses 4. Compatible with Canon EOS cameras including: EOS 10D, 20D, 20Da, 30D, 40D, 50D, 60D, 60Da, 70D, 80D, 90D, EOS 5D, 5D Mark II, 5D Mark III, 5D Mark IV, 5DS, 5DS R, 6D, 6D Mark II, 7D, 7D Mark II, 1D, 1D Mark II, 1D Mark IIN, 1D Mark III, 1D Mark IV, 1Ds, 1Ds Mark II, 1Ds Mark III, 1D C, 1D X, 1D X Mark II, EOS Rebel, XT, XS, T1i, T7i, SL1, SL2, SL3 5. Also compatible with select cinema cameras featuring Canon EF mount, such as Blackmagic Pocket Cinema Camera 6K, Z CAM E2S6, E2F6, and E2F8 models