Patents related to photo lenses

Started 6 months ago | Discussions thread
ipopov Regular Member • Posts: 165
Re: Leica Summicron Mandler 1976

Maybe the datasheet is for the different version of the lens and they had slightly different focal lensgth? I believe there were 2 versions of Summicron-R 50/2. On the other hand, optical diagram is very similar.

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