So,
I got M1 - planning to sell it together with my Elmar-M 50mm/3.5
M1 come with one problem: slow shutter speeds are inaccurate: 1s is more less ok, but 1/2, 1/4 ... 1/30s are all like 1/30s.
I have exactly the same problem with my original nikon F. Comparing shutter of M1 with my M3 (that works ok) - I see that shutter is not completely closed after shutter fires. I have tested the camera and it works great: no light leaks, other speeds are accurate, all looks and works great.
What it can be, and how much expensive can it be?
Thanks,
Darko