Lens Mount: Canon EF
Focal Length: 24-70mm
Maximum Aperture: 1:2.8
Lens Construction: 18 elements in 13 groups
Diagonal Angle of View: 84° - 34°
Focus Adjustment: Inner-focusing with USM
Closest Focusing Distance: 0.38m/1.25 ft.
Zoom System: Rotating Type
Filter Size: 82mm
Max. Diameter x Length, Weight: 3.5 x 4.4 in., 28.4 oz. / 88.5 x 113mm, 805g