Oh, I forgot to ask Bob: Sinar mentions a "Macro Sinaron" in 180 mm, and also a n "Apo Sinaron" as optimized for 1:1, but not in 180mm. Am I correct that you're talking about the Macro Sinaron?
What is the straight Rodenstock (i.e. non-Sinar branded) version, and what are t he differences, if any?
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