I know that this post is more than 3 years old. But I want to thank you for the information provided here. I manage to build my first diy single focus Anamorphic adapter.
I use Schneider ES cinelux 2x Anamorphic lems, 100d achromat (i don't know the strength of the diopter), and 0.45x wide adapter. It has a very soft focus at wide open (jupiter 9 85mm f2.0). Even when I stop down the edges is still very soft.
What should I do to correct it? Can anyone help me?
The result is the photo I took straight from the monitor.