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Sigma AF 18-200mm f/3.5-6.3 DC OS (Optical Stabilizer) Zoom Lens for Sigma Digital SLR Cameras

5.0 out of 5 stars 2 customer reviews

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Summary | Reasons to buy | Sample Images

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  • Lens coating reduces and flare and ghost; zoom lock switch eliminates "zoom creep"
4 new from $340.00 3 used from $183.49

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Technical Details


Review summary from DPReview

January 2009
This isn't a lens for pixel-peepers who demand critical corner-to-corner sharpness in every shot, but for users looking for a versatile, all-in-one travel lens within a budget, it fits the bill just fine.
Andy Westlake Andy Westlake
82%

Conclusion

This isn't a lens for pixel-peepers who above all else demand critical corner-to-corner sharpness in every shot. But for more normal users looking for a versatile, all-in-one travel lens within a budget, and who'd prefer to while away their evenings looking at and sharing their images rather than post-processing them, it fits the bill just fine.

Reasons to buy

  • Huge 11x focal length range, ideal general purpose and travel lens
  • Relatively low chromatic aberration
  • Low distortion (for a superzoom)
  • Reasonably effective optical stabilization system

Things to consider

  • Inconsistent sharpness - extremely soft at 80mm
  • Soft corners at all focal lengths
  • Occasionally indecisive autofocus
  • Slightly less resistant to flare than its more recent competitors

Suggested for

Travel and everyday use, where versatility of framing and portability are more important than maximum image quality.

Not suggested for

More demanding work, where the need for optical quality outweighs more practical concerns.
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Scoring is relative only to the other products in the same category.
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Product description

Product description

This 18-200mm F3.5-6.3 DC OS (Optical Stabilizer) high power zoom ratio lens is exclusively designed for digital SLR cameras and is capable of covering a wide range of focal lengths from wide angle to telephoto. It is equipped with Sigma's own unique technology of OS (Optical Stabilizer) function. This function uses two sensors inside the lens to detect vertical and horizontal movement of the camera and works by moving an optical image stabilizing lens group, to effectively compensate for camera shake. It automatically detects movement of the camera and compensates for camera shake when shooting moving subject such as motor sports. Two SLD (Special Low Dispersion) glass elements and three aspherical lenses provide excellent correction for all types of aberrations. The super multi-layer lens coating reduces flare and ghost. This lens provides superior image quality throughout the entire zoom range. An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using circular polarizing filters and the petal-type lens hood supplied.

Amazon.com

The Sigma 18-200mm high-zoom-ratio lens is designed exclusively for Sigma digital SLR cameras and is capable of covering a wide range of focal lengths, from wide-angle to telephoto. Two Special Low Dispersion (SLD) glass elements and two hybrid aspherical lenses correct for all types of aberrations, letting Sigma house the extended-range super-zoom lens in a compact and lightweight body that measures 70mm in diameter and 78.1mm long and weighs a mere 14.3 ounces. The new lens coating, meanwhile, reduces flare and ghost--a common problem shared by many digital cameras--while also creating an optimum color balance. Other details include a minimum focusing distance of 45cm (17.7) at all focal lengths, a high zoom ratio of 11:1, and a maximum magnification of 1:4.4.

The lens design incorporates an inner focusing system that prevents the front of the lens from rotating, making it particularly suitable for using circular polarizing filters and petal-shaped lens hoods. In addition, the overall length of the lens never changes during focusing, making the lens convenient to handle and easy to use. Finally, the lens's zoom lock switch eliminates "zoom creep" during transport--a convenient addition when traveling. The lens, which includes a metal mount, is backed by a one-year warranty.


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on March 20, 2009
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