Kenko Auto Extension Tube Set DG 12mm, 20mm, and 36mm Tubes for Canon EOS AF Mount
Extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance. The DG extension tubes have no optics. Contains three tubes of different length, a 12 mm, 20 mm, and 36 mm Designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with most Canon, Nikon, and Minolta lenses
