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

Porst 240 mm f/ 4.5 Super Tele Auto (1) used:

NameFull namePlaceScoresRank
1Tom_GERTom Andernach1554.33lvl.4 (Lens-Pro)