I am selling a vintage brass Voigtländer & Sohn in Wien, Braunschweig petzval or euryscope lens. it is a No. 1 lens, meaning it has a shorter focal length. The glass is in very good condition, with little to no scratches.

Based off of my own calculations, the lens has a focal length of 190mm, and has an aperture of f/4.2. The waterhouse stop is about f/5.4. I'm not 100% certain on these numbers, but they sound accurate and should yield an accurate exposure if used. A recalculation wouldn't hurt though.

Includes leather/felt cap.