Optical Stabilizer (OS) function, developed with Sigma’s own technology, compensated for shaking of the camera.

Using Sigma’s original OS (Optical Stabilizer) function, two types of sensors inside the lens detect vertical and horizontal movement of the camera.

New coating reduces Ghost and Flare

The new multi layer lens coating and lens design reduce flare and ghost, which is a common problem with digital cameras and also creates an optimum color balance through the entire zoom range.

Two types of camera-shake compensation modes to handle all types of shooting conditions

In Mode 1, the system detects and compensates for vertical and horizontal movement of the camera; ideal for still-image photography. And in Mode 2, the system detects and compensates for vertical movement of the camera; ideal for motor sports and other situations where panning may be desired.

*NIKON cameras: OS system can be used with Nikon cameras, which are compatible with image blurring compensation mechanism. It can be used with the following Nikon cameras -- F6 and F100, F80/N80 series - F65/U, F75/U2, D2H, and D1 series, D200, D100, D70, D50, D80, D40. Also with the Fuji Film FinePix S2 Pro and the FinePix S3 Pro. OS mechanism cannot be used with other camera models. In addition, OS mechanism and Auto Focus operation of this lens may not work properly with the Nikon F5 cameras.

SLD (Special Low Dispersion) glass

This lens has two SLD (Special Low Dispersion) glass elements in the front lens group and one in the rear lens group for correction of chromatic aberration throughout the entire zoom range.

Rear focus and zoom lock switch

The rear focus eliminates the need for the front of the lens to rotate, thus allowing the use of circular polarizing filter. A zoom lock switch is built in to prevent the lens from extending due to its own weight, and the lens is easier to use.

Optional APO Tele-Converter EX

It is also possible to use this lens with Sigma 1.4x EX and 2x EX APO Tele-Converter to make ultra tele-zoom. With the optional APO tele-converter 1.4x EX, it works as a manual focus tele-zoom lens from 112mm to 560mm F6.3-8. With APO tele-converter 2.0x EX, it works as a manual focus tele-zoom lens from 160mm to 800mm F9-11.