The Viltrox AF 27mm F1.2 Pro is a fast standard prime lens for Sony APS-C E-mount mirrorless cameras, featuring an ultra-bright f/1.2 aperture equivalent to approximately 40mm field of view, with a premium Pro-series optical design and build quality. It provides fast autofocus and supports firmware updates via USB. Part of Viltrox's Pro series for Sony E-mount crop-sensor cameras.