Colorful Metal TTL Auto Focus AF Macro Extension Tube Ring for Canon EOS EF EF-S 60D 7D 5D II 550D Feature: This AF Extension Tube Set (Aluminum Colorful Version) can perfectly transform your Lens into a Macro Lens for great Macro shooting. It drives the lens by film or digital sensor and does not affect aperture and image quality. Meanwhile, it is combined with 3 pieces of different tubes (length: 13mm, 21mm, 31mm) which can either be used separately or in any combinations (totally 7 different combinations) to satisfy your different magnification requirement. Furthermore, the tube is electronic one that can achieve functions of Auto-focus as well as TTL auto exposure by working with all EF and EF-S mount Canon lens.
