Fotodiox Pro Automatic Macro Extension Tube Kit for Canon EOS EF-Mount Camera

The Pro Auto Macro Extension Tube Kit from Fotodiox is a set including 13mm, 21mm, and 31mm automatic tubes. The electronic contacts on these tubes allows for automatic functions to work, including autofocus and aperture control. The extension tubes can be used independently or added together for extreme macro photography. As no other optical components are added with this kit, the image retains the original optical properties of the lens.