Sigma Introduces Super Wide-Angle Zoom Lens
By
Mike Pasini, The Imaging Resource
(Tuesday, June 17, 2003 - 11:17 EDT)
Sporting a 24mm wide-angle focal length and a fast f2.8 aperture, Sigma's new zoom mounts on Sigma, Canon, Nikon, Minolta and Pentax cameras.
Highlights of the new design include:
- 24mm focal length with a fast f2.8 maximum aperture;
- A special low dispersion glass element
and two aspherical lenses to compensate for color aberration, as well as
astigmatism;
- An internal focusing system, which eliminates front lens rotation, allowing use of polarizing filters and Petal type hoods;
- Arsenic free ecological glass; and
- Sigma, Canon, Nikon, Minolta and Pentax mounts.
See the press release below for full product specifications.
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Original Source Press Release:
| Sigma Introduces Super Wide-Angle Zoom Lens A zoom lens with large aperture from 24mm super-wide-angle
From wide angle of view more than 80° at 24mm to standard 135mm zoom lens, large aperture has been achieved. One Special Low Dispersion (SLD) glass element and 2 Aspherical Lenses effectively compensate the color aberration, as well as astigmatism, results in a high level of optical performance. At 24mm focal length this lens has a fast F2.8 maximum aperture.
This lens has a super wide range of angles of view from 84.1 to 18.2 degrees. It incorporates an internal focusing system, which eliminates front lens rotation, allowing use of polarizing filters and Petal type hoods. The lens materials used in this new lens are lead and arsenic free ecological glass.
THE SPECIFICATIONS
Focal Length :24-135mm
Minimum Aperture :F32
Lens Construction : 16 Elements in 15 Groups
Focusing System :Internal Focusing
Angle of View :84.1°-18.2°
Number of Diaphragm Blades :9pcs
Minimum Focusing Distance :50cm (19.7?)
Maximum Magnification :1:4.5
Filter Size :�p77mm
Lens Hood : Petal Hood
Dimensions :Diameter 83.6mm (3.3?)X Length 90.9mm (3.6?)
Mounts (AF) :Sigma, Canon, Nikon (D), Minolta (D), Pentax
Weight :530gr/17ounces |
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