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

Sigma Zoom 28-200 mm f/ 3.8-5.6 UC used:

NameFull namePlaceScoresRank
1r0land 16.95lvl.1 (Lens-Learner)
2dragankg 5.2lvl.1 (Lens-Learner)
3Albert Gabriel 14.6lvl.1 (Lens-Learner)