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

Vivitar 28-70 mm f/ 3.5-4.8 MC Macro used:

NameFull namePlaceScoresRank
1Mac Wyd 516.4lvl.3 (Lens-Competent)
2Toon Perdaens 170.4lvl.2 (Lens-Adept)