The angle of view provided by this focal length is one of the most comfortable and versatile on both 35mm full frame format and APS-C format cameras, and with that, this lens can be used for anything from close-ups to landscapes. With its superb optics and large f/1.4 maximum aperture, this is one of the finest fast 35mm lenses in its class. Glass-molded aspherical lens improves optical stability and precision. Focus hold button locks autofocusing for full creative control Auto clutch to stop manual focus ring rotation, wide focus ring for a solid feel in manual focusing