PMA 2009: Sigma has released an image-stabilized version of its budget telezoom lens, the 50-200mm F4-5.6 DC OS HSM. This  features the same new optical stabilization unit as seen on the 18-50mm F2.8-4.5 EX DC HSM also announced today, which is compatible with Pentax and Sony bodies with in-body anti-shake systems. The new lens also includes a number of user-friendly features rarely seen at this level, including a  hypersonic motor for fast, silent autofocus, and an internal-focusing design with a non-rotating front  element. It will be available in mounts for Sigma, Canon, Nikon, Sony and Pentax DSLRs, and is designed for cameras with APS-C/DX sized sensors only.

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Press Release:

SIGMA 50-200mm F4-5.6 DC OS HSM

March, 2009: The Sigma Corporation is pleased to announce the new SIGMA 50-200mm F4-5.6 DC OS HSM. This compact high-performance telephoto zoom lens incorporates Sigma’s own Optical Stabilizer function. The lens incorporates SLD (Special Low Dispersion) glass in the front lens group and is equipped with an inner focusing system to provide high image quality throughout the entire zoom range.

The incorporation of HSM (Hyper Sonic Motor) ensures quiet and high-speed auto focus. The OS (Optical Stabilizer) function effectively eliminates the effects of camera shake so subjects can be easily and clearly seen in the viewfinder as well as in the image. It allows the use of shutter speeds approximately 4 stops slower than normal for steady, handheld photography.

For Sony and Pentax mounts he built-in OS System operates in conjunction with a camera body equipped with an anti-shake function and can be used as an alternative with cameras having built-in image stabilization. The Super Multi-Layer Coating reduces flare and ghosting and provides high contrast images throughout the entire zoom range.

This lens has a minimum focusing distance of 110cm (43.3 inches) throughout the entire zoom range and a maximum magnification ratio is 1:4.5. An inner focusing system eliminates front lens rotation, making it suitable for use with circular polarizing filters.

SIGMA 50-200mm F4-5.6 DC OS HSM specifications

Focal length 50-200mm
Maximum aperture f/4 - f/5.6
Minimum aperture f/22
Lens construction 14 elements / 10 groups
Angle of view 27.9°-7.1°
Closest focus distance 110cm/ 43.3 in
Maximum reproduction ratio 1:4.5
Aperture blades 8
Filter attachment size 55 mm
Lens Mount Sigma, Canon, Nikon(D), Sony(D), Pentax
Dimensions 74.4mm × 101.9mm (2.9 x 4 inches)
Weight TBC
Supplied accessories • Case
• Bayonet type hood