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

Ernst Leitz Wetzlar Summicron 50 mm f/ 2 used:

NameFull namePlaceScoresRank
1AlibabaAmeri Sani AlibabaTehran91.2001lvl.1 (Lens-Learner)
2Brad Maestas 55.2lvl.1 (Lens-Learner)