Focal length and maximum aperture: 75-300mm 1:4-5.6 Lens construction: 13 elements in 9 groups Diagonal angle-of-view: 32°11'-8°15' Focus adjustment: front group rotating extension system with USM Closest focusing distance: 1.5 m/4.9 ft Zoom system: rotating type Filter size: 58mm Length x max. diameter, weight: 71 x 122.1mm, 480g