More on Amazon.com : http://www.amazon.com/gp/product/B00JVJUNOO?tag=thefatkidin06-20 <br /> <br />XCSOURCE? Macro Auto Focus Extension Tube For Canon EOS Camera Red 5D 6D 60D 600D 7D 70D 700D <br /> <br />This Macro Extension Tube Set includes 3 extension tubes13mm21mm31mm <br />You may mount the tubes between lens and camera body to get your choice of macro ranges There are totally 8 combinations <br />It moves the lens farther from the film or digital sensor The farther away the lens is the closer the focus the greater the magnification <br />This extension tube does not affect image quality as there is no optics inside <br />Designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with Canon DSLR Body
