Hello,
I have an old brass barrel lens, Rapid Rectilinear made by Beck, 101mm. It has the Wheel Stops for aperture adjustment. There are four aperture holes but they are marked with two aperture numbers per hole. I'm looking for help to properly read these numbers. They are labeled like this:
16 f 16
32 f 22-6
64 f 32
128 f 45-2
I took a photo of it here:
http://th08.deviantart.net/fs70/PRE/...ry-d5u315w.jpg
Thanks for any help you all can give me. For now, I'm going to take a guess that each aperture is approximately between the numbers given. I've been using the first number for each stop and having good luck with it.
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