The SMC Pentax FA 50mm f/1.4 is a fast standard prime lens in Pentax's FA series, combining autofocus operation with a bright f/1.4 maximum aperture. It is one of Pentax's most capable standard lenses, suited to a broad range of photographic subjects from portraiture to everyday and available light photography. The bright f/1.4 opening delivers strong low-light performance and effective subject separation with shallow depth of field. At wider apertures the lens renders with smooth bokeh that suits portraiture and available light photography, transitioning to high sharpness across the frame as stopped down. On 35mm film and full-frame digital bodies, 50mm closely approximates the natural angle of view of the human eye, making it a versatile focal length for street, documentary, portrait,.