Zeiss Ultron 50mm f/1.8 normal lens. Made in Germany. Serial #7223372.This lens will fit Zeiss Icarex 35 bayonet lens mount cameras. Seven (7) optical elements in 6 groups. Slightly convex front element. (5) aperture blades. This lens can also be used on all mirrorless digital cameras like the Canon R, Fuji X-Pro2, XT-2, Nikon Z. Olympus Pen F, OM-D5 Mark II, OM-D1 Mark II, Panasonic Lumix G9, GH-4, GH-5, Sony a 7rV, Sony a7SIII, a7R IV with the proper adapter. Front filter size is Zeiss bayonet. Minimum focus distance is less than 18" or .45m. Aperture range is f/1.8 - f/16. Focusing is marked in feet and meters. Lens has an automatic aperture that requires that you activate the stop down pin to get the aperture to close down. No manual aperture setting on this lens. . Lens is in Ex+/Ex++ or 8.5/9 of 10 cosmetic condition. CLA’d in September of 2023. Nice clean condition lens barrel with small signs of prior use. No dings or dents. Super clean optics. No cleaning or coating marks on either the front or rear elements. Small Lens Separation on the outer edge of the rear element. This small separation is on the outer edge of the rear element and should not affect on your photos. Few small dust spots inside visible with a flashlight only. Smooth focusing. Good working lens aperture with small oil on the blades. Lens aperture pin on the back of the lens must be pushed in by a camera body or a pro mirrorless lens adapter to get the aperture to change. No rust on the chrome parts. Quite sharp and unusual lens with fantastic contrast and optical resolution. Hard to find in this clean condition. Comes with a Sony E mount Adapter that allows you to manually change the lens aperture, original rubber lens hood, and front lens cap. Sony camera pictured is NOT included!

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Albrecht W. Tronnier designed the Ultron 50mm f1.8 while working for Voigtländer AG, which filed the patent for this lens design in 1969, and had it approved in 1971. After a short run, in 1972 the lens production ceased. Carl Zeiss (which owned Voigtländer) only made a few thousand lenses in Voigtländer plant, West Germany, which makes them quite rare.  This particular lens design makes it a unique and exciting lens to own for collectors and photographers alike. No other lenses utilise the same optical formula. Color-Ultron 50mm f1.8 succeeded this lens and was designed by Dr. Erhard Glatzel. It had a slightly convex front element, as opposed to concave glass element present in this lens. 

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Don't miss this nice clean example of the Zeiss Ultron 50mm f/1.8 normal lens in Icarex 35 bayonet mount with small separation on the rear, and recent CLA with Sony E mount adapter. Sells with NO RESERVE at a price of  $395. I have lot more Zeiss, Leitz, Angenieux, Cooke, Dallmeyer and Exakta mount lenses, other rare FAST lenses, Medium and Large Format cameras, on my other Auctions, eBay Store and web page.