Originally Posted by
Pere Casals
Tony, here you have conceptual issue.
With flashes and GN, the distance from camera to subject is always irrelevant, what is used in de calculation is the distance from flash to the subject, both in 35mm and in LF. In 35mm flash can be not in the camera...
So to apply GN always use flash to subject distance, adding the bounce in the ceiling if it's the case.
What is different in LF is that you have to use the bellows compensation factor, exactly the same factor has to be applied for flash exposure or for (no flash) outdoor shots, for close subjects.
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