John Shriver
Well-known
The exact start point of the threads on the lens and mount isn't well-controlled. As they wear, the lenses screw on "further".
I think the source (for different pitch) was the post-war military report on the Leica factory. Can't find it at the moment.
I think the source (for different pitch) was the post-war military report on the Leica factory. Can't find it at the moment.
ChrisLivsey
Veteran
This is the report, part 1 link to part 2 at the bottom:
http://www.angelfire.com/biz/Leica/page26.html