19th Century Petzval lenses compared.

There's quite an excellent array of lens tests on the Web for your favourite Canon/Nikon/Sony/Pentax/Olympus/Leica/etc. lens.  But how often do you get to see a sharpness comparison of 19th century Petzvals? Antov Orlov has done just that:

Petzval Lens Sharpness Test - Voigtlander vs. Dallmeyer vs. Scovill Peeless vs. C. C. Harrison vs. Darlot

I feel a little easier about my recent acquisition of a Dallmeyer 3B. Neat!  Thanks Anton!