Reviews
I removed the flange and everything was fine. However
A well built adapter. I bought it to use with my 1:1.4 50mm Takumar (Pentax) lens. Unfortunately there is a flange inside the barrel below the m 42 screw mount that would not allow the inside element of the lens to travel as I focused. I removed the flange and everything was fine. However, finding an Allan/Hex wrench to fit the tiny screws proved impossible. Had to make one using a piece of soft metal rod... Now that I have it working I'm happy with the adapter.
07.12.2015