An antique British lens engraved. This early petzval was made circa 1860 according engraving and serial number.
This is a convertible lens: portrait mode when using as petzval, and landscape mode when you unscrew the front achromat and screw it at the rear of the tube barrel. There is a washer stop inside tube (no stop included, easy to DIY). Estimated focale length in portrait mode: 150mm, covering quarter plate.
Estimated focale length in landscape mode: 320mm, covering whole plate. Brass barrel wears a lot of marks due to age. The rack and pinion focusing system has one screw missing. Glasses are in good condition and complete, with slight cement separation on the very edge. Original brass mounting flange and brass cap are included.Diameter of washer stop: 42mm. Diameter at mounting thread: 58mm. External diamter of flange: 86mm. A beautiful piece of history in working order, for collectors and wet plate enthusiasts. Could be fun to adapt on digital camera. Check out my other antique lenses for sale. L'item "Early Petzval SHEPHERD convertible portrait / landscape large format brass lens" est en vente depuis le jeudi 27 décembre 2018.
Il est dans la catégorie "Photo, caméscopes\Photographie ancienne\Objectifs anciens". Le vendeur est "75photographica" et est localisé à/en Paris, Ile-de-France.
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