This Macro Extension Tube Set includes 3 extension tubes:13mm,21mm,31mm.
You may mount the tubes between lens and camera body to get your choice of macro ranges. There are totally 7 combinations.
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.
This extension tube does not affect image quality as there is no optics inside.
Designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with Canon DSLR Body.
Material: Metal Bayonet and Plastic Body
Color: Gold Bayonet and Black Body
Suitable For: Canon EF/EF-S Lens and DSLR Body.
1 x Macro Extension Tube Set For Canon
1 x Front Cap
1 x Rear Cap