Features: 16-35mm ultra-wide-angle zoom lens with f/2.8 maximum aperture 3 high-precision aspherical lens elements produce superior image quality, Closest focusing distance: 0.92 feet Circular aperture produces natural background blur at wider apertures, Ring-type USM for fast and quiet autofocusing; internal focusing Measures 3.5 inches in diameter and 4.4 inches long; 1-year warranty Inner focusing system with USM Closest Focusing Distance 0.28m / 0.9 ft. Zoom System Rotating type Filter Size 82mm Max. Diameter x Length, Weight 3.3″ x 4.1″, 1.3 lb. / 83.5 x 103mm, 600g
