Nikon Nikkor MF 50mm f/1.2 AI-s normal lens. Made in Japan. Serial # 371828. Lens will fit Nikon manual focus Non AI cameras, like Nikon F2, F2S, FT, FTN, Nikkormat, Lens can be used on Nikon  AI mount camera's like the F2AS, F3, FA, FM2, and FE2, FM_3a, N2000 ect. Lens aperture is f/1.2 - f/16. Filters size is 52mm. Minimum focus distance is 1.7 ft. or 0.5 meters. This super fast prime is a favorite lens for existing light shooters. Lens is in Ex -or 7.5 of 10 cosmetic condition. One dent in the front of the focusing ring. Lens makes a little "snapping" noise when you turn the focusing ring off of infinity. Focus fairly smooth otherwise. This lens is being sold AS-IS NO Return or Exchange due to the dent in the focus ring. Clean glass with some small dust spots inside that can be seen with a flashlight only. Nice coating. Perfect working aperture. Blades are clean and smooth. A must have lens for your Nikon manual focus AI-s system. Lens comes with original Nikon L37 UV filter filter, front and rear caps. Sells AS-IS with NO RESERVE at a price of $245. I have more Nikon cameras, lenses, accessories, 35mm Rangefinder cameras and lenses,  Medium and Large Format cameras, on my other Auctions, web page and E-Bay Store.