Focal Length: 180mm
Maximum Aperture: 3.5
Minimum Aperture: 32
Lens Construction : 12 elements in 8 groups
Diagonal Angle of View : 24o
Focus Adjustment : Inner focusing system with USM
Closest Focusing Distance : 0.48m / 1.6 ft.
Filter Size : 72mm
Dimensions (D x L): 82.5 x 186.6mm (3.2" x 7.3")
Weight: 1090g (2.4 lbs)