Surprisingly well made, only my lens does not like them partially

The rings do not last due to the metal thread impression of high quality and tight at the camera. Unfortunately, like my 17-55mm 2.8 IS USM only the smallest ring without restrictions; with the largest I ought already to bury the object to be photographed in the front lens to represent it sharp. On stacking the rings is not to think.

The set is well optimized for the much shorter-building kit lenses. Unfortunately, there is not the rings individually, otherwise I would not buy the smallest me and would thus be very happy.