Fotodiox 49mm Macro Reverse Mount Adapter, for Canon EOS 1D, 1DS, Mark II, III, IV, 1DC, 1DX, D30, D60, 10D, 20D, 20DA, 30D, 40D, 50D, 60D, 60DA, 5D, Mark II, Mark III, 7D, Rebel XT, XTi, XSi, T1, T1i, T2i, T3, T3i, T4, T4i, C300, C500;

By mounting the lens backward on a camera body, you can create amazing macro images. It is extremely fun to turn you lens into a macro lens. You can mount lenses with 52mm filter thread size of any brand. It will be more fun to use on lenses with aperture dial to adjust aperture.