Lens, Hermagis, Eidoscope n°3
This lens, manufactured by Hermagis, has a maximum aperture of f/4.5 and a focal length of F=275mm. Aperture is changed thanks to a ring which goes from f/4.5 to f/20. Lens diameter is 6cm accross. The serial printed on the lens barrel is 392800. Paris post WWII, date at which most lenses tended to have the lens holder board centered rather than further down the barrel. No fungus, no haze, no separation, no scratches.