Originally Posted by
Pere Casals
Antonio,
A 135mm focal is a 135mm focal, so from lens rear nodal point to the image plane you have 135mm, (for distant subjects, of course). The single question is the flange to the rear nodal point distance, but it should not be far from diafragm plane...
I'd replace the GG by a clean one, you can get one for 4x5 (some 18€) at e*ay and make it cut.
Then I would place a measuring tape on the floor and I'd calibrate the focusing scale, using the loupe, I'd stick a label on it and I'd make the new markings.
Saludos,
Pere
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