Q and A: What's the difference between the new Sigma 10-20 mm f/3.5 lens and the original?
Amazon.com : Sigma 10-20mm f/3.5 EX DC HSM ELD SLD Aspherical Super Wide Angle Lens for Nikon Digital SLR Cameras : Digital Slr Camera Lenses : Electronics
Sigma 10-20mm f/3.5 EX DC HSM lens reviews, specification, accessories - LensBuyersGuide.com
Sigma 10-20mm F/3.5 HSM review
Sigma 10-20mm F3.5 EX DC HSM sample photos - ExploreCams