The Sony 85mm F2.8 SAM is a prime lens that allows full-size sensor compatibility, and is an ideal focal length for portraits or mid-telephoto shots when used with Alpha DSLR cameras with an APS-C sensor.The 85mm F2.8 SAM lens combines corner to corner sharpness at all apertures, high-contrast imaging along with a wide aperture for ideal background defocusing. Sony’s SAM AF drive delivers smooth AF operation, all in a compact and lightweight size. Compatible with all Sony Alpha DSLR models, and includes a lens shade.