I recently picked up a late model (circa 1967) 120mm Angulon f:6.8 in great condition except the Prontor press shutter has some problems. Today I bought a 210mm f:6.8 Rodenstock Geronar in a nice looking black Copal #1 shutter. What I would like to do is swap the lens elements of the Geronar with the Angulon. My question is, will there be any issues that I must deal with and will the aperture scale be accurate.
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