The Yongnuo YN 35mm f/1.4C DF UWM is a luminous wide-angle lens for Canon EF-mount, offering a broad angle of view paired with a bright f/1.4 aperture, making it ideal for low-light situations and depth of field control. Constructed with two aspherical and two low dispersion elements, this optic effectively minimizes spherical and chromatic aberrations, optimizing image sharpness and color fidelity. Additionally, it features a multi-layered coating technology to reduce lens flare and ghosting, ensuring high image contrast and color precision. Driven by an Ultrasonic Wave Motor, it delivers quick and whisper-quiet autofocus, with the added versatility of a quick shift between auto and manual focus via a dedicated switch. For convenience, firmware updates can be applied through its built-in micro-USB port.