18
12.
Now remeasure the testing distance between the image plane mark on the camera body and the test chart
(= the actual distance)
If the testing distance has changed, note the distance. The change indicates that the flange focal distance
of the ZEISS CP.3 must be adjusted. Proceed with the steps in Correcting the Flange Focal Distance.
13.
Do not take down the setup as you will need it again to recheck the sharpness later in the process.