Hi I was asked about a large format collectible lens, but I don't know the answ er. I believe someone from this forum can help us out. It's a R.O.J.A Vorm Emi l Bausch Rathenow Rapid Aplanat #2 Series D F8 brass barrel lens. The lens is a bout 50 mm tall, front diameter about 40 mm and rear 35 mm. F stops labelled as 8, 12, 16, 20,...., 360. Does anyone know about its construction (elements in groups), coverage, focal length, and sharpness? Thanks in advance.
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