All About Photographic Lenses.
Specifications, comparison, reviews, MTF-charts for lenses by Canon, Nikon, Sony, Pentax, Olympus, Sigma, Tamron, Carl Zeiss, etc.

Vivitar 70-200 mm f/ 3.8 MC used:

NameFull namePlaceScoresRank
1jafrro 25.9lvl.1 (Lens-Learner)