This flexible wide-angle prime is ideal for general shooting applications, ranging from street photography to event shooting, and its impressively bright f/1.4 maximum aperture excels in difficult lighting conditions and offers increased control over depth of field. The optical design incorporates a series of low dispersion and aspherical elements, which control a variety of aberrations in order to achieve high image clarity and sharpness. A BBAR-G2 coating has also been applied, and helps to reduce flare and ghosting for improved color and contrast when working in strong lighting conditions. Complementing the optics, a USD motor and Dynamic Rolling-cam mechanism are also employed to ensure quick, quiet autofocus performance along with seamless full-time manual focus override. Additionally, the lens features a moisture-resistant construction along with a front fluorine coating to support working in harsh weather conditions.