More on Amazon.com : http://www.amazon.com/gp/product/B00A6U7I7M?tag=thefatkidin06-20 <br /> <br />Opteka 25mm Auto Focus DG EX Macro Extension Tube for Canon EOS 70D 60D 60Da 50D 7D 6D 5D 5Ds <br /> <br />Extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance <br />Designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with Canon EOS SLRs <br />Tube length 25mm <br />Glass-free Lightweight <br />1 Year Opteka Warranty
