The Kenko Extension Tube Set is very popular because it is a good value and has high functionality. The Kenko set is functionally similar to the Canon I searched hard to find a physical difference between the Kenko and the Canon 12mm Extension Tube. What I found is that they are far more...Give you lens macro photography capabilities with this Kenko Extension Tube Set. Simply attach the rings to your Sony E-mount camera for boosting the magnification capacity of its regular lenses, without compromising on picture quality. It comes with electronic contacts to maintain the Auto Focus ability.