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 F3.5 EX DC HSM Overview: Digital Photography Review
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