X-Mount Lens/APS-C Format, 35mm (35mm Equivalent), Aperture Range f/1.4 to f/16, Two ED Elements, Two HR Elements, HD Nano Multi-Layer Coating, STM Stepping AF Motor, Integrated USB Port for Firmware Updates, 9-Blade Diaphragm. Characterized by its sleek and versatile design the Viltrox AF 23mm f/1.4 XF is a 35mm-equivalent wide-angle prime lens designed for APS-C-format FUJIFILM X-mount mirrorless cameras. The flexible wide-angle focal length pairs with the bright f/1.4 maximum aperture to suit working in a variety of lighting conditions and also enables enhanced control over depth of field for isolating subject matter using selective focus techniques. The optical design incorporates a pair of extra-low dispersion elements and a pair of high refractive index elements which combine to suppress a variety of aberrations and produce high sharpness clarity and color accuracy. An HD Nano multi-layer coating has also been applied to reduce flare and ghosting for greater contrast in bright and backlit conditions. In terms of handling the compact lens incorporates an STM stepping motor which produces fast near-silent and accurate autofocus performance along with full-time manual focus override. An internal focusing design also contributes to quick performance. Additionally the lens features an integrated micro-USB port for making future firmware updates to the lens.