Quote Originally Posted by ruilourosa View Post

crossing cells would affect quality? what about spacing... many questions!!!!!


Rui Lourosa
Correct spacing would be a job for an expert, which I am not.
But, if you tweak the spacing until you get a flat field at say 50x the focal length, it will work surprisingly well. I did this with some old Dagor lenses from 6" to 300mm.