Wont allow infinity focus
I bought two of these and have tried them on a number of lenses and cameras. They fit very well and feel almost like you've switched your lens for a genuine K mount. HOWEVER, they do not allow any of the lenses to go to full infinity focus. I think its the thickness of the ring holding the lens about half a mm too far from the sensor/film. I have checked back to back with a different style of ring, and that one does go to infinity so its definitely this ring causing the problem. A real shame because the price is so low and the functionality is great. I now use these rings just for casual indoor photos/filming as they are no use out of doors.
Verified purchase: Yes | Condition: New