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

Sigma AF 50 mm f/ 2.8 EX DG Macro used:

NameFull namePlaceScoresRank
1Alex777xxx 59.4lvl.1 (Lens-Learner)
2CarlosPTYCarlos Saldana 12.6lvl.1 (Lens-Learner)
3Lasse Svenson 56.5lvl.1 (Lens-Learner)
4NerveNet JavierMadrid1455.55lvl.4 (Lens-Pro)