I've been directed to that site for a couple years, and just now figured out the navigation. There is a wellspring of quantitative data there, even on several Voigtlander and I think one Dallmeyer Petzval. The problem is it's difficult enough scientific data already, and it's in French also! I couldn't find the projection section, but here are some petzvals:
http://dioptrique.info/base/n/n_portrait.HTM
Task for someone:
1. Convert this site to English
2. Condense, synthesize, and explain in layman's terms your findings on Petzvals
!!
Garrett
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