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

Sigma AF 120-400 mm f/ 4.5-5.6 APO DG OS HSM used:

NameFull namePlaceScoresRank
1Andreas Lindemann Northern Hessen19738.1lvl.7 (Lens-Guru)
2jafrro 25.9lvl.1 (Lens-Learner)