Well built, good quality product that works as advertised. Worth noting that the easiest and safest way to dismount your M42 lenses from the adapter is while it is still attached to the camera.
27/09/2018
I knew before buying this adapter that you cannot focus to infinity. I wanted to experiment with it because it does snap in place when it's installed. The other type of adapter that does allow focus to infinity also has its disadvantages.
03/06/2016
excellent quality both in finish and practical use, highly recommended.
04/05/2016