Steinheil Macro-Quinar 100mm f/2.8 telephoto macro lens. Made in Germany. Serial #2351505. Zebra style lens finish. This lens will fit M42 Pentax screw lens mount camera's like the Pentax H1a, H3V, Spotmatic, and other M42 lens mount cameras. This lens can also be used on all mirrorless digital cameras like the Canon R, Fuji X-Pro3, XT-4, Nikon Z. Olympus Pen F, OM-D5 Mark III, OM-D1 Mark III, OM-1, Panasonic Lumix G7, G9, GH-4, GH-5, Sony a 6500, Sony a7SII, a7RIV ect. with the proper adapter.  Minimum focus distance is less than 2' or .8m . Aperture range is f/2.8 - f/22. Focusing is marked in feet and meters. Lens has a semi-automatic or manual aperture. Lens is in Ex/Ex- or 7.5/8 of 10 cosmetic condition. Fair condition lens barrel with some small marks and paint wear from prior use. No dings or dents. Fairly clean optics. Some small fine cleaning/coating marks on the front and rear elements. These minor fine coating marks will have no affect on your photos. Few small dust spots inside visible with a flashlight only. Some small lens separation around the edge of the front element, and a couple of small about 1/8" spots of separation under the front element. This lens separation probably will not affect your images. This lens is being sold AS-IS NO Return or Exchange due to the lens separation. Smooth focusing. Working lens aperture with no oil on the blades. Blades are smooth. No rust on the chrome parts. Quite sharp and unusual Steinheil macro lens with good contrast and optical resolution. Hard to find in this M42 lens mount. Comes with a rear lens cap. Don't miss this good user example of the Steinheil Macro-Quinar 100mm f/2.8 telephoto lens in Pentax screw M42 mount. Sells AS-IS with NO RESERVE at a price of $595. I have lots of more Angenieux and Exakta mount lenses, and other rare lenses in Exakta mount. Also accessories, 35mm Rangefinder cameras and lenses,  Medium and Large Format cameras, on my other Auctions, web page and E-Bay Store.