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Hi All I have 2 Rodenstock lenses, 1 @210/5.6 and 1@300/5.6. Their barrels read "Rodenstock Sironar-N" only without any APO desgnation. Does this mean these lenses are not Apochromatic? The reason I ask is that any literature that I read on these lenses always includes the APO designation. Thanks in advance. Wayne
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