First post!
So I just bought my first 4x5 camera, a Wista 45SP w/ Schneider APO-Symmar 135mm f/5.6 lens. I decided that I will use a technique to calculate bellows factor for exposure compensation that requires knowing the length the bellows have extended in MM. I will be taking the lens focal length of 135mm and calling it "f/13.5" and taking the bellows extension measurement in MM, say for example 220mm and calling it "f/22" and counting the number of stops between f/13.5 and f/22 to calculate exposure factor. In this example it would come out to be 1.5 stops.
However, I need to be able to quickly measure the bellows extension length in MM to do this. I see little measurement tic marks on the side of the Wista 45SP tray. Are these markings in MM? Do I measure the extension of the bellows from the point where it's folded up? Please help me figure this out so I can start shooting. Any advice here would be greatly appreciated!
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