Nikon Nikkor-S.C 5cm (50mm) f/1.4 Nippon Kogaku Japan lens for Nikon S mount rangefinder cameras. The aperture adjustment operates very smoothly, and the aperture blades are free of oil. There are a few cleaning marks on the front element and a couple of very faint cleaning marks on the rear element. These superficial cleaning marks will have no effect on its performance. Otherwise, the glass is excellent, clean and clear, with no fungus, haze or separation of its elements. There is a little finish loss around the nose, exposing the underlying metal in places, along with a couple of very light scuffs and minor scratches on the exterior barrel. Please examine photos carefully for condition.