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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. To deal with all kinds of photographic situations, the system has two camera-shake compensation mode:1 which detects and compensates for both vertical and horizontal movement, and 2 which compensates for vertical movement only.
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.
