Flexible cable connection
Reverse and positive mount on lens,realize macro photograpy easily.
Compatible all macro extension tubes and macro bellows almost.
For all Canon EOS EF DSLR & Canon EOS EF SLR
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.