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

Vivitar 500 mm f/ 8.0 Preset used:

NameFull namePlaceScoresRank
1Sjoerd MeulenSjoerd van der Meulen FotoFriesDrachten111.2lvl.2 (Lens-Adept)