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

Minolta MD 20 mm f/ 2.8 used:

NameFull namePlaceScoresRank
1Brandon 52.7lvl.1 (Lens-Learner)
2Aravier BatizAravier Batiz Santa Monica, California.180lvl.2 (Lens-Adept)