Does anyone have any experience with a R&J Beck Variable Softness Portrait Isostigmar Ser.VI barrel lens? I came across one and it seems like a design similar to the old cooke knuckler type lens. The one I picked up appears to be about a 9 inch FL I am getting some chromes back in a few days and hope to have a better idea as to how the diffuser/sharpness ring works. The image on the gg is really fuzzy when the diffuser ring is turned to the extreme.
Jon
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