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

Sigma DG C 100-400 mm f/ 5-6.3 OS HSM used:

NameFull namePlaceScoresRank
1Ben Simo Arizona268.4lvl.2 (Lens-Adept)
2Mac Wyd 518.7lvl.3 (Lens-Competent)