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

Sigma DG 15-30 mm f/ 3.5-4.5 EX Aspherical used:

NameFull namePlaceScoresRank
1feesa Jürgen117.75lvl.2 (Lens-Adept)
2Sony Kusumo 140.4lvl.2 (Lens-Adept)
3BernardBernard MoizanTours94.7998lvl.1 (Lens-Learner)