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

Sigma AF 28-105 mm f/ 3.8-5.6 UC-III Aspherical IF used:

NameFull namePlaceScoresRank
1Steve Johnson 43.35lvl.1 (Lens-Learner)