I have purchased a Rodenstock Sironar 150mm. There are NO additional letters and the lens is labeled 1:5.6 but the scale on the shutter also lists 450mm and f 16-64. I am guessing that this is for use with only the rear element.
Is this type of lens corrected enough with just the rear element that I can expect crisp color images or only B&W with a narrow band filter?
I bought it for use as a 150mm so the 450mm would only be a bonus.
Thanks
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