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

Sigma AF 55-200 mm f/ 4-5.6 HSM DC used:

NameFull namePlaceScoresRank
1BritMotuzenko VladimirRostov-on-Don305.101lvl.3 (Lens-Competent)
2Francisco Nunez Pachuca145.5lvl.2 (Lens-Adept)
3Tom_GERTom Andernach1554.33lvl.4 (Lens-Pro)