This high zoom ratio lens is exclusively designed for digital SLR cameras and
is capable of covering a wide range of focal lengths from wide angle to telephoto.
It is equipped with Sigma's own unique technology OS (Optical Stabilizer)
function. This function uses two sensors inside the lens to detect vertical and
horizontal movement of the camera and works by moving an optical image stabilizing
lens group, to effectively compensate for camera shake. It automatically detects
movement of the camera and compensates for camera shake when shooting moving subject
such as motor sports. Two SLD(Special Low Dispersion)glass elements and two aspherical
lenses provide excellent correction for all types of aberrations. The super multi-layer
lens coating reduces flare and ghosting. This lens provides superior image quality
throughout the entire zoom range. An inner focusing system eliminates front lens
rotation, making the lens particularly suitable for using circular polarizing
filters and the petal-type lens hood.