Here's an interesting auto focus lens for Sony that covers a full frame sensor. The new Samyang AF 75mm f/1.8 FE is a unique short-telephoto lens well-suited for portraiture, with a distinct focal length, compact design, and bright f/1.8 maximum aperture. Both the price and focal length sit somewhere between Sony's own 50mm 1.8 and 85mm f/1.8 lenses. The optical design incorporates a three extra-low dispersion elements and a pair of high refractive index elements, which help to suppress both chromatic and spherical aberrations for improved sharpness, color accuracy, and clarity.
An Ultra Multi-Coating has also been applied to reduce flare and ghosting in order to achieve higher contrast when working in strong lighting conditions. The lens's linear STM autofocus motor works in conjunction with Sony cameras' AF systems for quick, quiet, and precise focusing performance (yes Autofocus works in video mode also), and manual focus override is also available for more refined control. Additionally, a Custom Switch enables making intuitive adjustments of a variety of camera and exposure settings by rotating the lens's focusing ring. The new Samyang 75mm f/.8Available is available now via B&H (found here).