Kenko Macro Automatic Extension Tube Set DG for Canon EOS
TheKenko 3-Piece DG Automatic Extension Tube Setis designed specifically for use with Canon digital SLR cameras and lenses ranging from macro to semi-telephoto. They are exceptionally useful for macro photography, enabling you to convert almost any lens into a macro lens. This set contains three tubes of different length -- 12mm, 20mm, and 36 mm -- which can be used individually or in any combination to obtain the desired magnification. They maintain auto focus and TTL auto exposure.