A high-speed lens with extraordinary richness of image contrast over the entire aperture range. Even wide open at f/1.4 its performance is exemplary and perfectly useable. Stopping down by one or two apertures improves the initially high imaging quality only to a minor degree. And the wide f/1.4 aperture provides a very bright, crisp viewing image and enhances the ability to use selective focus. In addition to the outstanding optical qualities of this standard 50mm lens, it also offers a great deal of operational flexibility based on its high speed and compact size.