The online calculation was verified only under Chrome browser!
The reference points on the CMOS sensor
The target picture. First one for activating the autofocus, the second for adjusting the focus manually, to find out the offset values. The points 1,2,3 and 4 should be at the side of the picture which can be seen in the liveview display at 10x magnification.
At the moment the calculator does not work.
I will try to fix the problem.