Description:This Auto Extension Tube Set is specially designed for Canon digital and film cameras. Extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance. Getting closer has the effect of magnifying your subject. This Macro Extension Tube is used by attaching between camera body and Canon lenses, it comes with a set of 3 tubes of different lengths. By moving the lens father away from the film or CCD sensor in the camera, the lens is forced to focus much closer than normal. The greater the length of the extension tube, the closer the lens can focus.They are exceptionally useful for macro photography, enabling you to convert almost any lens into a macro lens at a fraction of the cost while maintaining its original optical quality.Features:Light weight designTubes may be combined for greater magnificationIncludes 3 tubes of different lengths 13mm, 21mm, and 31 mm - which can be used individually or in any combination to obtain the desired magnification.Designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with most Canon lenses, given enough light to activate the cameras AF system properly.Body Material: Plastic, Bayonet material: Metal, light and easy to carryCamera Compatibility:Canon EOSCanon EOS 1D, 1DS, 1DS Mark II, 1D Mark II, 1D Mark II N, 1D Mark III, 1DS Mark III, 1D Mark IV, 1DX.Canon D Series:Canon 10D, 20D, 30D, 40D, 50D, 60D, 60DA, 7D.Canon EOS Rebel:Canon EOS Rebel, XT, XTi, XSi, T1i, T2i, T3i, XS, T3European Model #"s:Canon EOS Rebel 300D, 350D, 400D, 450D, 500D, 550D, 600D, 1000D, 1100D.Package Contents:1x Macro Extension Tube Set NOTE: Extension Tube only, camera not included