Focal Length : 500mm
Maximum Aperture : 4
Minimum Aperture : 32
Lens Construction : 17 elements in 13 groups
Diagonal Angle of View : 5o
Focus Adjustment : Inner focusing system with USM
Closest Focusing Distance : 4.5m / 14.8 ft.
Filter Size : 52mm Drop-In
Dimensions (D x L) : 146.0mm x 387.0mm (5.8" x 15.2")
Weight : 3870g (8.5 lbs)