Excellent optical performance
SLD (Special Low Dispersion) glass elements and the inner focusing system provide excellent correction for all type of aberrations. High image quality is assured throughout the entire zoom range.

Telephoto zoom lens with a compact construction
The lens has a compact construction with an overall length of 102.2mm (4.0") and a maximum diameter of 74.4mm (2.9"). It is ideal for many situations such as landscape and general photography.

SIGMA's own unique OS (Optical Stabiliser) technology
This lens is equipped with Sigma's own unique OS function. This system offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible. It also compensates for camera shake when shooting moving subjects such as motor sports. The OS function can be also used for Sony and Pentax mount. As compensation for camera shake is visible in the viewfinder, the photographer can easily check for accurate focus and ensure there is no subject movement.
· It is not possible to use the built-in OS function of this lens, when using with Pentax ist* series and K100D DSLR cameras.

Quiet and fast AF
The incorporation of HSM and an inner focusing system provide fast and quiet auto-focusing.
· AF will not function with Pentax camera bodies that do not support HSM.

High contrast image quality
The Super Multi-Layer Coating reduces flare and ghosting and ensures high contrast image quality throughout the entire zoom range.

Ideal for use with polarising filters
The lens design incorporates an inner focusing system which eliminates front lens rotation. This makes the lens particularly suitable for using a circular polarizing filter.

Close focusing capability
This lens has a minimum focusing distance of 110cm (43.3") throughout the entire zoom range, and has maximum magnification of 1:4.5, making it ideal for close-up photography.

* Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.

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