100% crops at f1.4(f1.5) and f4, for CZ Planar T* 85/1.4 and 1930's CZJena Biotar 75/1.5, overlaid on image taken with 1930's Carl Zeiss Jena Biotar 75mm f1.5 at f4.
(c) Robert Dodds, except for the prior work of others quoted here for informational purposes only
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