Canon EF 300mm f/4L IS USM Image Stabilizer AutoFocus Telephoto Lens

Compact L-series telephoto lens with an Image Stabilizer which compensates for camera shake with the equivalent effect of a shutter speed two stops faster. Two Image Stabilizer modes are provided: Stabilizer Mode 1 (the same mode featured on the EF 75-300mm f/4-5.6 IS USM) and the new Stabilizer Mode 2 which steadies the image during horizontal or vertical panning. Mode 2 detects the panning direction automatically. The closest focusing distance is 4.9 feet (1.5 m).
Specifications
Construction 11 groups /15 elements
Angle of view 8° 15'
F stop range 4-32
Closest Focusing Distance 1.5m / 4.9 ft.
Maximum Magnification 1:4.2
Filter Size 77mm
Dimensions (Length x Diameter) 3.5" x 8.7" / 90.0 x 221.0mm
Weight 2.6 lbs. / 1,190g