EF 17-35mm f2.8L USM

introduced 1996

Focal length and maximum aperture: 17-35mm 1:2.8
Lens construction: 15 elements 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