I want to use the AP telecompressor to take advantage of its illumination.
I am using a RC 12,5" f/9 with a STL11000 + 8 positions FW + MOAG S.
I would like to calculate the backfocus I need in order to have a flat field, because actually using it, I only have 50% curvature!
I have difficulties to find informations about it.
Can you help me please?