Point being, calculations are not as useful as one might believe due to the unpredictability of how images and their required image ratios vary all over the place due directly to the nature of view camera lenses which do NOT have a fixed back focal length as with fixed lens box based cameras.

At some point it is quite possible a lens with longer than 250mm / 10" focal length could be needed. Once above 300mm, the bellows/camera extension of 370~ mm will prove to be no where near enough.

These are the very real world limitations of a light weight field folder cameras that modular monorail cameras simply do not have. Camera choice is completely dependent on lenses needed to achieve the image goals and what hardware is required to achieve the expected image goals.


Bernice



Quote Originally Posted by olk View Post
Is this a guess or did you calculate that more than 340mm bellows extension is required for the Imagon (focal length nominal 250mm but as Drew mentioned it is actually 276mm) for head/shoulder portraits?

Oliver