Neewer Lens Mount Adapter Ring for M42 (42mm x1 thread Mount) Lens to Canon EOS DSLR Cameras, such as Canon EOS 1d,1ds,Mark II, III, IV, 5D, MarK II, 7D, 10D, 20D, 30D, 40D, 50D, 60D, Digital Rebel xt, xti, xs, xsi, t1i, t2i / 300D, 350D, 400D, 1000D, 450D, 500D, 550D