Originally Posted by
Steven Tribe
If it is the no. 9 Petzval, it is as anachromatique describes.
Looking at the photos once more, I think this is the famous sechszoller (six-incher) Petzval which is the same as no.9 Petzval. One sold at auction (no. 1000!) was 47cm long and weighed 14.3 kilos. There is a separation of the barrel by the flange brass and a system for central stops there.
The Front lens would be 16.5cm across and it covers just 18.5 x 18.5 inches.
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