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The following is an unedited press release, shown as received from the company represented. We've elected to present selected releases without editorial comment, as a way to provide our readers more information without further overtaxing our limited editorial resources. To avoid any possible confusion or conflict of interest, the Imaging Resource will always clearly distinguish between company-provided press releases and our own editorial views and content.

Sigma's 50-200mm F4-5.6 DC OS HSM lens. Photo provided by Sigma Corp. PRESS RELEASE: SIGMA announces 50-200mm F4-5.6 DC OS HSM

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
Sigma's 50-200mm F4-5.6 DC OS HSM lens. Photo provided by Sigma Corp. Click for a bigger picture!
Bayonet type hood (LH674-01) supplied
Specification(For Sigma mount)
Lens Construction 14 Elements 10 Groups
Maximum Magnification 1:4.5
Angle of View 27.9°-7.1°
Filter Size Φ 55mm
Number of blades 8pcs
Lens Hood Bayonet type hood
Minimum Aperture F22
Minimum Focusing Distance 110cm / 43.3 in
Dimensions Φ 74.4mm × 101.9mm / 2.9” x 4”
Weight TBD
Corresponding AF Mounts
  • Vignetting will occur if the lens is used with 35mm SLR cameras or digital cameras with image sensors larger than APS-C size.

  • For Pentax mount, if the camera body does not support HSM, auto focus will not be available.

  • The apperarance and specifications are subject to change without notice.

(First posted on Monday, March 2, 2009 at 20:00 EST)

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