CowboyStudio Canon EOS Macro Extension Tube for Extreme Close-up Shots, Fits Canon 1D, Mark II, III, IV, 5D, Mark II, 7D, 10D, 20D, 30D, 40D, 50D, 60D, Rebel XT, XTi, XS, XSi, T1i, T2i, 300D, 350D, 400D, 450D, 500D, 550D, 1000D

One (1) macro ring extension tubeMade of sturdy metal rings with a professional black finishConsists of three different rings, providing you with multiple different focus optionsRings are simple to adjustWorks in manual focus modes only
Product DescriptionMacro tubes moves the lens farther away from your film or digital sensor, transforming your lens into a macro lens. The extension tube contains no optics or mirrors inside, so the quality of your image is not impacted.

This macro

Source: Digital Camera and Video Store...