It is a short-back focus custom lens that covers a 16-35mm ultra-wide angle area with a focal length image of 35mm conversion. Uses 2 types of aspherical lenses and a super UD lens, highlighting high depictions throughout the zoom.I'm proud.The shortest shooting distance is 0.24m in the entire zoom.In addition to quiet and high -speed AFs, ghosts and flare are minimized by optimizing coating and lens placement.In addition, a circular aperture is used to achieve a beautiful blur taste.It has excellent operability, such as an unpleasant lens, a non -rotating front, and a full -time manual focus.- lens configuration 13 10 groups shooting distance range 0.24m ~ ∞ Maximum shooting magnification 0.17 times Filter diameter 77mm Maximum diameter x length φ83.5 x 89.8mm Mass 385g