This is the classic Orthostigmat set lenses made by Beck under Steinheil licence for UK market in the turn of 1900. Orthostigmat lens is a modified Kollinear optical design. The Convertible Orthostigmat casket lens set is made of one brass barrel, with iris scaled for different foci (from f6.8/6.5in to f12.5/14.5in), a lens hood, and 3 glasses (10in, 12.5in, 14.5in). Covers basicaly 5x7in and much more according the lens used. (you could find any information in your "Lens Collector Vade Mecum").
In very good condition according its age, everything works as it should, glasses have some dust and very slight marks, iris turns smoothly. Each lens was stored in black tissue pouch. The wooden casket is in correct condition.
Flange is missing (mounting thread 45mm). A definitively rare optical tool for collectors and large format photographers.
Check out my other antique lenses for sale. L'item "Beck Steinheil Orthostigmat casket Series II Set IV large format 4x5 5x7" est en vente depuis le mercredi 20 février 2019. Il est dans la catégorie "Photo, caméscopes\Photographie ancienne\Objectifs anciens".
Le vendeur est "75photographica" et est localisé à/en Paris, Ile-de-France. Cet article peut être expédié aux pays suivants: Amérique, Europe, Asie, Australie.