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

Sigma APO 70-200 mm f/ 2.8 EX DG OS HSM used:

NameFull namePlaceScoresRank
1sart 60.6001lvl.1 (Lens-Learner)
2Brian WebbBrian Webb Brian WebbMitchell5.5lvl.1 (Lens-Learner)
3Rainer MarjenauMarjenau RainerBad Rothenfelde539.75lvl.3 (Lens-Competent)
4Bilal 21.7lvl.1 (Lens-Learner)