Outstanding resolution and superb overall performance in a lightweight and compact zoom lens. The 28-75mm F/2.8 Di III VXD G2 (Model A063) is a fast-aperture standard zoom lens for full-frame mirrorless cameras. The lens is the successor to the popular 28-75mm F/2.8 Di III RXD (Model A036), the lens that flipped conventional thinking about standard zoom lenses upside down.