Nikkor-S 50mm f/1.4 is a standard prime lens. The manual focus Non-AI lens requires stop-down metering on modern cameras for accurate exposure. 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 50mm lens employs optical construction of seven element in five groups, 46° angle of view, 2 feet close focusing distance and 52mm filter thread.