I have a Rodenstock 120mm f/5.6 APO-Rodagon D enlarger lens that I need to mount to a Cambo 4x5 camera and I'm trying to figure out whats size hole I need on the board. The lens has 38mm threads so I'm thinking most likely a Copal No. 1 board. Has anyone treid this or know if I'm on the right track?
Thanks.
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