The Nikon NIKKOR-S Auto 50mm F1.4 is a very bright prime standard lens boasting high optical performance, and is particularly useful for taking photos with beautifully blurred backgrounds, such as portraits and night scenes. Appearance: There are some scratches. Please see the photos for details. Function: The focus ring, aperture, and aperture blades all operated smoothly. There is no balsam separation. It is a Nikon F mount. Lens: When light is shone from behind, there is only a slight amount of dust visible. There is no haze, fungus, or scratches.