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

Pentax SMC 100mm f/4 Macro used:

NameFull namePlaceScoresRank
1cycleuser 7.3lvl.1 (Lens-Learner)