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

Canon EF 24-70 mm f/ 4 L IS USM used:

NameFull namePlaceScoresRank
1Alexey_Barov 104.8lvl.2 (Lens-Adept)
2Carstor 59lvl.1 (Lens-Learner)
3purelightglow 71.4lvl.1 (Lens-Learner)