Nikkor 50mm f/2 is standard prime lens still regarded as one of the world's top ranking optical instruments, even today. The 50mm lens is compact and versatile lens suitable for portraiture and an array of photographic applications. It has sharp optics that can compete with modern lenses. The manual focus Non-AI lens requires stop-down metering on modern cameras for accurate exposure. The 50mm lens employs optical construction of six elements in four groups, 46° angle of view, 0.45 meters close focusing distance producing a 1:6.7 magnification ratio, six aperture blades and 52mm filter thread.