After a little bit of impulse bidding, I now own a Rodenstock 5.6/210 Sironar and was hoping to get some of the finer details and specs, including image circle, and which modern lens this is equivalent to. I am assuming this is the earlier version of the Sironar N, it does not have Apo printed on it. It's in a syncro compur shutter. Any info appreciated!
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