2008 Photo Marketing Association Tradeshow
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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 APO 120-400mm F4.5-5.6 DG OS HSM lens. Courtesy of Sigma, with modifications by Michael R. Tomkins. PRESS RELEASE: Sigma launches APO 120-400mm F4.5-5.6 DG OS HSM lens


  • Incorporating Sigma’s original OS (Optical Stabilizer) function.
  • Three SLD glass elements and a rear focus system provide optimum image quality throughout the entire zoom range.
  • Super multi-layer coating reduces flare and ghosting.
  • The minimum focusing distance of 150cm (59.1”) makes it useful for close-up photography.
  • HSM ensures quiet and high-speed autofocus.
  • Compatible with Sigma’s APO Tele Converters.

Telephoto zoom lens incorporates Sigma’s original OS (Optical Stabilizer) function

The Sigma Corporation is pleased to announce the launch of the new APO 120-400mm F4.5-5.6 DG OS HSM.

This telephoto zoom lens incorporates Sigma’s original OS (Optical Stabilizer) function. It offers the use of shutter speeds approximately 4 stops slower. Three SLD (Special Low Dispersion) glass elements provide excellent correction for chromatic aberration. This lens is equipped with the rear focus system that minimizes fluctuation of aberration caused by focusing. It provides optimum image quality throughout the entire zoom range. The super multi-layer coating reduces flare and ghosting. High image quality is assured throughout the entire zoom range. The minimum focusing distance of 150cm (59.1”) throughout the entire zoom range and has a maximum magnification of 1:4.2 make it useful for close-up photography. This lens incorporates HSM (Hyper Sonic Motor), which ensures a quiet and high-speed AF as well as full-time manual focusing capability. The addition of the optical 1.4x EX DG APO or 2x EX DG APO Tele Converters produce a 168-560mm F6.3-8 MF ultra-telephoto zoom lens or a 240-800mm F9-11 MF ultra-telephoto zoom lens respectively.

Lens Construction

21 Elements in 15 Groups
Angle of View 20.4 - 6.2 degrees
Number of Diaphragm Blades 9 Blades
Minimum Aperture F22
Minimum Focusing Distance 150cm / 59.1 in.
Maximum Magnification 1:4.2
Filter Size Diameter 77mm (Rear)
Lens Hood Bayonet-type Hood
Dimensions Diameter 92.5mm X Length 203.5mm
3.6 in. X 8 in.
Weight 1750g/61.7 oz.

Corresponding AF Mounts

SIGMA, CANON, NIKON, PENTAX, SONY

* The appearance, specifications, and the like of the product are subject to change for improvement without notice.
* The angle of view depends upon the digital camera being used.


(First posted on Thursday, January 31, 2008 at 17:37 EST)

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Top 3 photos this month win:

1 $300 Adorama Gift Certificate

2 $200 Adorama Gift Certificate

3 $100 Adorama Gift Certificate