Focal length and maximum aperture: 28-70mm f/2.8 Lens construction: 16 elements in 11 groups Diagonal angle-of-view: 75° - 34° Focus adjustment: front group rotating extension sydtem with USM Closest focusing distance: 0.5 m/ 1.6 ft Zoom system: rotating type Filter size:77mm Length x max. diameter, weight: 117.6 x 83.2mm, 880g
