Sigma 18-200mm f/3.5-6.3 DC OS HSM Lens Lewiston ME
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Sigma 18-200mm f/3.5-6.3 DC OS HSM Lens Review at Cameratown.com
Sigma 18-200mm f/3.5-6.3 DC OS HSM Lens Review
Reader Score: 6.00 (out of 10)
Review (Summary) "The Sigma 18-200mm f/3.5-6.3 DC OS HSM is the latest in the company's long line of superzooms, which stretches back to the early 1990s and a series of 28-200mm (and later 28-300mm) lenses for 35mm SLRs. ...Like all superzooms the Sigma 18-200mm OS features a complex optical design, in this case 18 elements in 13 groups including one Super-Low Dispersion (SLD) glass element, and no fewer than three aspherical elements to combat aberrations. ...
... Most interestingly, this is a lens which appears to concentrate on minimizing distortion and chromatic aberration rather than maximizing sharpness. This immediately means it won't win the favor of a certain type of resolution-obsessed photographer, who will look on its inconsistent sharpness (and indeed substantial lack of it at mid-telephoto focal lengths) with displeasure...."
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