Pixco Lens Adapter For Pentax K Mount Lens To Canon EOS EF SLR Camera Body Adapter Ring Compatible with:Canon EOS 760D, 750D, 5DS(R), 5D Mark III, 5D Mark II, 1Ds Mark [IV / III / II / I ], 1D Mark [III / II N/ II / I], 6D, 5D, 7D, 70D, 60D, 50D, 40D, 30D, 100D, 700D, 650D, 600D, 550D, 500D, 450D, 400D, 350D, 300D, 1200D, 1100D, 1008D It is a Pentax lens to Canon 50D 5D 1D EOS EF Lens mount adapter ring It is durable and reliable for long-term use Smooth surface for effortless mount