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

Sigma APO 70-210 mm f/ 2.8 used:

NameFull namePlaceScoresRank
1agrillo 22.7lvl.1 (Lens-Learner)