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

Sigma 150 mm F 2.8 EX DG OS HSM APO Macro used:

NameFull namePlaceScoresRank
1andreaspekte AndreasBrandenburg129.25lvl.2 (Lens-Adept)