![Sigma 17-50/2.8 OS wide angle field-of-view vs. others: Nikon SLR Lens Talk Forum: Digital Photography Review Sigma 17-50/2.8 OS wide angle field-of-view vs. others: Nikon SLR Lens Talk Forum: Digital Photography Review](http://i.imgur.com/oOroP.jpg)
Sigma 17-50/2.8 OS wide angle field-of-view vs. others: Nikon SLR Lens Talk Forum: Digital Photography Review
![DA* 16-50mm vs. Sigma and Tamron 17-50mm F2.8 Comparison Review - Introduction | PentaxForums.com Reviews (Mobile) DA* 16-50mm vs. Sigma and Tamron 17-50mm F2.8 Comparison Review - Introduction | PentaxForums.com Reviews (Mobile)](https://www.pentaxforums.com/content/uploads/files/77/63/16-50_comparison_xh175.jpg)
DA* 16-50mm vs. Sigma and Tamron 17-50mm F2.8 Comparison Review - Introduction | PentaxForums.com Reviews (Mobile)
![Amazon.com : Tamron SP AF17-50mm F/2.8 Di II LD Aspherical (IF) Lens with hood for Nikon-D DSLR Cameras : Camera Lenses : Electronics Amazon.com : Tamron SP AF17-50mm F/2.8 Di II LD Aspherical (IF) Lens with hood for Nikon-D DSLR Cameras : Camera Lenses : Electronics](https://m.media-amazon.com/images/I/71TFm3HJaYL.jpg)
Amazon.com : Tamron SP AF17-50mm F/2.8 Di II LD Aspherical (IF) Lens with hood for Nikon-D DSLR Cameras : Camera Lenses : Electronics
![Zoom lens comparison: Tamron 17-50 f2.8 VC, Sigma 17-50 f2.8 OS / 18-35 f1.8, Canon 17-55 IS USM - YouTube Zoom lens comparison: Tamron 17-50 f2.8 VC, Sigma 17-50 f2.8 OS / 18-35 f1.8, Canon 17-55 IS USM - YouTube](https://i.ytimg.com/vi/H_IqxRxzNJk/maxresdefault.jpg)