Sigma has introduced an optically stabilized f/3.5-6.3, 18mm-200mm autofocus zoom lens. Its optics are optimized for digital capture with an APS-C or smaller sensor. (Sigma warns that using the lens with larger sensors and film-based 35mm cameras will cause vignetting.)The lens offers a minimum focus distance of 17.7 inches throughout its focal-length range and a maximum magnification of 1:3.9. A magnification scale is displayed on the lens barrel, which also incorporates a zoom lock switch. The optics include a Special Low Dispersion element and three aspherical elements, as well as multi-layer coatings, to minimize optical flaws. The lens has a 72mm filter diameter.
The 21.5-ounce lens is available now with a Canon mount for a retail price of $820. It will be available with Nikon and Sigma mounts later this Summer.
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