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

Sigma AF 400 mm f/ 5.6 APO Macro /HSM used:

NameFull namePlaceScoresRank
1Lasse Svenson 56.5lvl.1 (Lens-Learner)
2Andreas Lindemann Northern Hessen19636.8lvl.7 (Lens-Guru)