Fotodiox Canon EOS Macro Extension Tube Set Kit for Extreme Close-up, fits 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, t3, t3i, 450D, 500D, 550D, 1000D, 1100D

You can use the camera mount coupling adapter and lens mount coupling adapter alone or with combination of any or all three extension tubes for extreme Macro photography. Since there is no other optical components been added, the image preserve the original optical property of the lens. This is a much desired way to turn your existing lens into a MACRO LENS.