Photokina 2006 Show
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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 18 - 50mm F2.8 EX DC Macro lens. Courtesy of  Sigma, with modifications by Michael R. Tomkins. PRESS RELEASE: 18 - 50mm F2.8 EX DC MACRO


NEW PRODUCT INFORMATION -

EX series large aperture zoom lens designed specially for use with digital SLR cameras with a minimum focusing distance of 20cm.

  • Minimum focusing distance of 20cm with a maximum magnification of 1:3.
  • Aspherical lenses offer compact and lightweight construction.
  • SLD and ELD glasses offer excellent correction of color aberrations.
  • New optical design minimizes vignetting.

The Sigma Corporation is pleased to announce the launch of the new 18-50mm F2.8 EX DC MACRO lens.

This lens has a large aperture of F2.8 throughout the entire zoom range, a minimum focusing distance of 20cm (7.9”) and a maximum magnification of 1:3, making it ideal for close-up photography.

Specially designed to suit the characteristics of digital SLR cameras this lens provides a high level of optical performance. Its design incorporates both glass-mold and hybrid aspherical lens technology which offers extremely high image quality as well as a compact and lightweight construction. Minimal vignetting and superior peripheral brightness is ensured.

Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) glass elements provide excellent correction of color aberrations. The super multi-layer lens coating reduces flare and ghosting, a common problem with digital cameras. High image quality is assured throughout the entire zoom range. An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the petal-type lens hood (supplied) plus circular polarizing filters.

THE SPECIFICATIONS.

Focal Length 18-50mm
Minimum Aperture F22
Lens Construction 15 Elements in 13 Groups
Angle of View 69.3°-27.9°
Number of Diaphragm Blades 7pcs
Minimum Focusing Distance 20cm (7.9”)
Maximum Magnification 1:3
Filter Size 72mm
Lens Hood Petal–type Hood
Dimensions Diameter 79mm (3.1in”) x Length 85.8mm (3.4”)
Weight 450gr /16.0oz

Optional Accessories

  • DG UV72 mm 0085126 923747
  • DG WIDE CIRCULAR PL72 mm 0085126 923853
  • Lens Hood LH780-04 0085126 923624

UPC Codes
SIGMA AF 0085126 581565
SONY AF 0085126 581343
NIKON AF 0085126 581596
PENTAX AF 0085126 581602
CANON AF 0085126 581541
FOUR THIRDS AF 0085126 581589

*Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.

Sigma's 18 - 50mm F2.8 EX DC Macro lens. Courtesy of  Sigma, with modifications by Michael R. Tomkins. Click for a bigger picture!


(First posted on Tuesday, September 26, 2006 at 02:00 EDT)

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