35-nap2-3M - changing bokeh

[Arti G]

I use GH2 + Helios 44-7 58mm f2 + 35-nap2-3M (35-nap2-3M) 80-140 f1.8 2x My problem is that I have vertical and horizontal bokeh. Foreground blur is vertical and background blur horizontal, so changing focus means bokeh goes from horizontal to vertical and vertical to horizontal. It's strange behaviour. Do you know why does it happen? See test from 3:30:

 

[Matthias Malleši�]

I have two of them. I guess you're lens aren't collimated properly. Have a test with someone pointing a flashlight towards you (not laser!!). Flare lines must be parallel to each other. Will check one of mine and post some info later.