Focal Length : 300mm
Maximum Aperture : 2.8
Minimum Aperture : 32
Lens Construction : 17 elements in 13 groups
Diagonal Angle of View : 8o 15'
Focus Adjustment : Inner focusing system with USM
Closest Focusing Distance : 2.5m / 8.2 ft.
Filter Size : 52mm Drop-in
Dimensions (D x L) : 128.0mm x 252.0mm (5.0" x 9.9")
Weight : 2550 g (5.6 lbs) (lens only)