Polaroid 58mm Filter Thread Lens, Macro Reverse Ring Camera Mount Adapter For The Canon Digital EOS Rebel T3i, T3, T1i , T2i, XSI, XS, XTI, XT, 60D, 50D, 40D, 30D, 20D, 10D, 5D, 1D, 5D Mark 2, 7D Digital SLR Cameras
The Polaroid camera lens revering ring is installed between a Canon camera body and a lens equipped with a filter thread diameter of 58mm. The lens does not have to be a Canon lens. Once attached to the camera the adapter ring provides 58mm male threads onto which you can attach any lens with 58mm female threads. Reversing a lens on a camera gives it macro capability-close up images without the expense of a new lens