The Image Stabilizer has two modes and it is compatible with Extenders 1.4x II and 2x II
L-series super telephoto zoom lens equipped with an Image Stabilizer. The fluorite and Super UD-glass elements largely eliminate secondary spectrum. The floating system also ensures high picture quality at all focal lengths. The Image stabilizer has two modes and it is compatible with Extenders 1.4x and 2x.
Canon's renowned Image Stabilizer (IS) technology compensates for approximately three stops without perceptible increase in image blur. This increases vastly the range of circumstances in which hand-held photography is possible, limiting the need to carry a tripod. Major movement in a particular direction is automatically detected as conscious panning. Correction is halted in the relevant direction, thereby preventing shake-return.
Ultra Sonic Motor
The ring-type USM delivers high-speed, high-precision, super efficient and virtually noiseless auto focusing, with good holding torque for rapid response, accurate stopping. Use of USM also allows full-time manual override without damage to the autofocus mechanism.