Robert Vigurs
17-May-2010, 16:50
I am considering buying a Rodenstock Sironar 240mm lens in a Copal 3. I am more interested in the Copal 3 for another lens I have, than the lens itself. I talked to a very helpful person at S K Grimes, and he explained the three sizes of Copal 3 shutters. The early white/silver ring used mostly on Japanese lenses,smaller thread size, the standard Copal 3, marked so,(m58-0.75,) and the Copal 3s which is a smaller thread size also. So it looks as if the shutter will work, however I can find no information on the lens. There is no serial #, and no N, or Apo designation. It appears to be not multicoated. Has anyone here used these early non designated Sironars? Are they 6 element, 4 groups? I would appreciate any information from any of you here with knowledge of this early Rodenstock. I thank you in advance.