Sigma has said that its 18-250mm F3.6-6.3 DC OS HSM superzoom lens is now available in mounts for Sony and Pentax SLRs. This lens incorporates a Hybrid Optical Stabilisation system, which can be used on bodies which have built-in anti-shake (the camera's stabiliser must however be switched off). It also has a hypersonic motor for fast and quiet autofocus, and a minimum focus distance of 45cm for close-up photography. The MSRP is $800 in the USA, and £559.99 in the UK.

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Press Release:

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

June 2009: 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 us 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.

  • 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 18-250mm F3.5-6.3 DC OS HSM specification

Maximum format size APS-C / DX
Focal length 18-250mm
Diagonal Angle of view 69.3º - 5.7º (1.7X APS-C)
Maximum aperture F3.5
Minimum aperture F22
Lens Construction

• 18 elements/14 groups
• 3 aspheric elements
• 4 SLD elements

Image Stabilization Yes
Number of diaphragm blades 7
Minimum focus 45 cm
Maximum magnification 1 : 3.4
AF motor type Hyper Sonic Motor
Filter thread 72 mm
Supplied accessories Front and rear caps
• Lens Hood
• Soft Case
Weight 630g (22.2 oz)
Dimensions 79mm diameter x 101mm length
(3.1 x 4 in)
Lens Mount Canon, Nikon, Pentax, Sigma, Sony