Neewer Multifunctional Electronic Automatic AF Auto Focus Macro & Reverse Mount On Lens Extension Tube with 58mm 67mm 72mm 77mm Adapter Rings for Canon EF/EF-S Mount Lenses, Fits Canon EOS 5D Mark 3 III 5D Mark 2 II 1Ds Mark IV III II I 1D Mark III II N II I 6D 7D 10D 20D 20Da 30D 40D 50D 60D 60Da 70D 100D 300D 350D 400D 450D 500D 550D 600D 650D 700D 1000D 1100D 1200D Rebel SL1 XT XTi XS XSi T1i T2i T3 T3i T4i T5 T5i Kiss F N X X2 X3 X4 X5 X6i X7i X50 X70 Digital SLR Camera Flexible cable connection. Reverse and positive mount on lens,realize macro photograpy easily. Compatible with almost all macro extension tubes and macro bellows. Canon Mount, for all Canon EOS EF DSLR & Canon EOS EF SLR. Adjustable Length.