Specifications:
Focal length: 70-200mm
Maximum aperture: f/2.8
Lens construction: 18 elements in 15 groups
Focus adjustment: Inner focusing system with USM
Zoom system: Rotating type
Closest focusing distance: 4.9 feet
Filter size: 77mm
Dimensions: 3.3 inches in diameter and 7.6 inches long
Weight: 1.3 Kg