Focal length and maximum aperture: 17-35mm 1:2.8 Lens construction: 15 elemenys in 10 groups Diagonal angle-of-view: 104°-63° Focus adjustment: inner focusing system with USM (Ultrasonic Motor) Closest focusing distance: 0.42m/1.4 ft Zoom system: rotation type Filter size: 77mm Length x max. diameter, weight: 83.5 x 95.7mm, 545g
