I am aware that for the most part Caltar lenses are rebranded lenses from either
Schneider or Rodenstock
I have purchased a Caltar Type S-150 f5.6
can someone please tell me the Schneider or Rodenstock equivalent name
related question
I keep seeing these letters after the lens names
in this case S
in another case N
what do those letters tell you
thanks in advance
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