A large-aperture, standard lens assuring exceptional image quality with minimal aberrationsStar-series lens, developed in pursuit of uncompromising imaging performancePENTAX has set the strictest standards for its Star-series lenses. Exceptional imaging performance, with distinctive visual elements such as a beautiful bokeh (defocus) effect, Large maximum F number, Outstanding optical performance and high-grade lens construction, providing a solid body construction, remarkable outdoor performance and superb maneuverability only when a lens satisfies all these standards is it designated as a top-of-the-line Star-series model. New-generation Star-series lenses are designed to meet even stricter standards than those established for existing models, to accommodate the much higher image quality and performance provided by advanced, next-generation digital Slr cameras.High-performance, next-generation lens with a large F1.4 maximum apertureThe Hd Pentax-d Fa 50mm F1.