Works in principle - unfortunately very shaky

First of all, the concept works in principle. The focusing range (depth of field) is by design very low.
The information of the lens to be transferred and the AF and metering works, at least for a ring. With two rings and this situation is a little harder. With three rings it has no longer works for me with the AF.
The game of the closures is unfortunately very great. With more than one ring, the lens on the camera is shaking. High unfortunately for me insufficient. Especially if you have paid at the lens on quality, you will notice the difference already very strong.
The material (plastic) seems more "favorable". I can imagine that the tightness is affected by the game to the closures. Did this not further tested. I send the item back. This is very easily due to the excellent service from Amazon.