The T mount adapter allows you to attach for Canon EOS DSLR/SLR camera to lenses, telescopes, microscopes, enlargers, and attachments that have a T2 universal thread mount. This adapter will work with any for Canon EOS camera body. Features: All being made of aluminum alloy (no plastic) It allows to keep the infinity focus Please install/uninstall the adapter after turning off the camera. Automatic focusing is unavailable M42*0.75 thread for matching. Specification: Condition: 100% Brand New Color: black Material: aluminum alloy Fit for all T/T2 mounting devices, such as microscope, telescope, T mount lenses. Fit for mount for Canon EOS DSLR (for Canon EOS 1D, 1Ds Mark II III, 5D, 5D Mark II, 5D Mark III, 5D, 5DR, 6D, 7D, 7DII, 10D, 20D, 30D, 40D, 50D, 60D, 70D, 77D, 80D, Rebel t1i, xt, xti, xs, xsi, 300D, 350D, 400D, 450D, 500D, 600D, 650D, 700D, 750D, 760D, 800D, 1000D, 1100D, 1200D, 1300D) Thread: M42x0.75mm Dimension: Approx. 63mm x 15mm / 2.5 x 0.6in Weight: Approx. 52g Settings: Put the adapter and the red mark of the lens ring together. Turn the adapter counterclockwise until the fixed point. It will use either manual or AV mode. Package List: 1 * Lens mount adapter (camera and other devices are not included) . Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.