Sigma 10-20mm f/4-5.6 EX HSM DC AF Review Round-Up
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Get information and user reviews for this lens at Amazon: Sigma 10-20mm f/4-5.6 EX DC HSM Wide Angle AF Lens & Filters & Close-Up Macro Set & 9 Year Warranty for Pentax SLR
Photo Zone
This lens showed a very good performance during the tests especially in terms of resolution. There’s some softness towards the extremes at 10mm @ f/4 but otherwise there’s really nothing to complain here (within this specific lens class anyway). The vignetting and distortions are quite comparable to the rest of the gang. Lateral CAs are generally well controlled except in the extreme corners of the image field. The Sigma offers a little extra kick regarding the widest setting (10mm vs 12mm of the Nikkor or Tokina) so the quality is fairly impressive regarding the increased design complexity here. The build quality is very good and the AF is both fast and virtually silent. If you’re looking for a candidate in this class the Sigma is worth a look but watch out for sample variations. “¦ READ FULL REVIEW