I'm quite new to large format photography, so I spent some time looking into bellows compensation factors. I ended up designing rulers in Photoshop to measure the bellows compensation factor based on bellows extension. So far I have created designs for 90mm, 150mm, 180mm and 210mm lenses.
I have written a short description of the steps I took and was wondering if anyone would be able to check that I've got the maths right and have a look at one of the rulers. The URLs for the description and image are:
Description
Ruler for 180mm lens (TIFF image)
Thanks very much
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