Sigma has announced the availability of the Sigma 18-250mm F3.5-6.3 DC OS HSM in Pentax and Sony mounts. This superzoom lens has been on offer for some time in Canon, Nikon and Sigma fit, but now Pentax and Sony owners can buy it too (though Sony A900 users should take note that the imaging circle of this lens is not big enough to cover the full 24x36mm frame). The Sigma 18-250mm F3.5-6.3 DC OS HSM incorporates a Hybrid Optical Stabilisation system which allows photographers to use the lens’ OS function even if the camera has a built in anti-shake system. If the photographer chooses to use the lens’ OS function, they must ensure that the camera’s built in stabiliser is switched off. The lens also boasts an inner focusing system that eliminates front-lens rotation.

Sigma Press Release

18-250mm F3.5-6.3 DC OS HSM for Sony and Pentax SLR Cameras

Compact, Optically Stabilised, Superzoom lens.

Equipped with Sigma’s own OS (Optical Stabiliser) function
SLD and Aspherical glass
Super Multi-Layer Coating reduces flare and ghosting
Equipped with HSM ensuring quiet and high speed AF
Exclusively designed for use with digital SLR cameras

Sigma Imaging (UK) Ltd is pleased to announce that the new SIGMA 18-250mm F3.5-6.3 DC OS HSM is now available in Sony and Pentax mounts.

This lens incorporates a Hybrid Optical Stabilisation system which allows photographers to use the lens’ OS function even if the camera has a built in anti-shake system. If the photographer chooses to use the lens’ OS function, they must ensure that the camera’s built in stabiliser is switched off.

This lens has only been available in Sigma, Canon and Nikon fit for two months and has already won two international awards including the 2009 TIPA Best Entry Level Lens award.

Four Special Low Dispersion glass elements and three aspherical lens elements provide excellent image quality throughout the entire zoom range. This lens has a minimum focusing distance of 45cm (17.7 inches) at all focal lengths and a maximum magnification ratio of 1: 3.4, making it ideal for close-up photography. The lens incorporates super multi-layer coating to reduce ghosting during backlight photography.

An inner focusing system eliminates front lens rotation, making it suitable for use with circular polarising filters and the supplied petal-type hood.

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