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

Sigma AF 50-200 mm f/ 4-5.6 DC OS HSM used:

NameFull namePlaceScoresRank
1margo 56lvl.1 (Lens-Learner)
2Alhutch 12.2lvl.1 (Lens-Learner)
3sljaka 13.5lvl.1 (Lens-Learner)