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

Sigma DN 30 mm f/ 2.8 used:

NameFull namePlaceScoresRank
1Patrick 52.5lvl.1 (Lens-Learner)
2Алексей Санкт-Петребург18.7lvl.1 (Lens-Learner)
3utak3r Szczecin18.2lvl.1 (Lens-Learner)
4James HeilJames HeilAugusta, Maine270.501lvl.2 (Lens-Adept)