The world s first F2.8 all-in-one zoom lens for full-frame mirrorless cameras. Lightweight (20.3 oz.) and compact size (4.6') for superior mobility. Superior up-close shooting performance (7.5' / 1:3.1 WIDE & 31.5' / 1:3.8 TELE). RXD stepping motor unit is exceptionally quiet. Moisture-Resistant Construction, Fluorine Coating, and Zoom Lock switch