Could please somebody of you with an NN3 measure the distance of the CP to the lower rail setting as i did with the NN5. I have chosen to set the cp-2 vertical to 60mm on the lower rail and the reading of the vertical rail is 73=13mm.
This means that we have to add 13 mm to (H) of the camera body in the data base wiki.panotools.org/Entrance_pupil_database for a lower rail setting with an NN5.
I suppose the distance is less with an NN3.
Thx in advance