Coupling an ultra-wide focal length with an impressively lightweight design, the Viltrox AF 9mm f/2.8 Air E Lens for Sony E-mount APS-C cameras offers a 13.5mm full-frame equivalent focal length that easily keeps your entire scene in frame, making it an ideal choice for landscapes, street photography, and indoor shooting. Smooth, quiet internal autofocusing is provided by the lens's STM motor. Additionally, an HD multilayer nano coating on the lens glass effectively reduces ghosting and flare, helping to create clearer images.