[bojan]

While the problem with the glass surface is being expertly sorted out by Stefan, I was working on modification to EOS..
I removed the iris and all mechanics around it (it will be a spare part in case someone needs it in the future), and designed the necessary parts to fit the EOS adapter..
I have two of them, one is with T-thread , another with M42x1mm.
The one with t-thread has necessary thickness to ensure the camera sensor is in the focal plane of the optical system, so I designed the fitting around it.

The printed plastic part turned out so well I decided to leave it as is.. I only need to slightly reduce the diameter of the section where thread is supposed to be.. so the metal ring of the adapter can be force-screwed on the plastic (unfortunately, my 3D printer is not capable of producing threads with such a small pitch (0.75mm.. or is it?) .. and I need to paint it black inside (or re-print it with black ABS).