An especially fast wide-angle lens, the Canon EF-mount YN 35mm f/1.4 from Yongnuo pairs the comfortably wide field of view with a bright f/1.4 maximum aperture to suit working in difficult lighting conditions. The optical design incorporates two aspherical elements, which reduce spherical aberrations and distortion, and two low dispersion elements, which minimize chromatic aberrations and color fringing, and individual elements also feature a multi-layer coating to suppress flare and ghosting for improved contrast and color accuracy. A DC motor affords quick and accurate autofocus performance and a switch lets you quickly change from AF and MF focusing methods. Additionally, a micro-USB port is integrated in the lens design to permit installing firmware updates.