I also own a Carl Zeiss Jena 58mm f/2 Biotar, an heirloom from my father's M42 days.
Mine is the earlier Pre-Set Version (1950 -1954) with black stripes on the aperture ring and twelve blades, marked with Q1 for "superior quality”, reserved for export.
I really need to adapt it again.
Also wanted to try it at close range with a Kenko Extension Tube. Carl Zeiss Jena Biotar 58mm f/2 Pre-Set Q1 by Vento, auf Flickr
Aug 04, 2023 at 09:21 AM
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