All About Photographic Lenses. Specifications, comparison, reviews, MTF-charts for lenses by Canon, Nikon, Sony, Pentax, Olympus, Sigma, Tamron, Carl Zeiss, etc.
Jena T 1:2.8 f=50 is a normal prime lens for 35mm SLR cameras.
The Performance 6, version 2 - so-called "small Tessar" (the small size - 32 mms and weight - 96 gr.) was released for cameras EXA. Also, similars, was released and with bayonet Altix.
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