DPReview TV: Sigma 60-600mm F4.5-6.3 DG DN OS Sport Review: Digital Photography Review
Amazon.com : Sigma 60-600mm f/4.5-6.3 DG OS HSM Sports Lens for Canon EF + Sigma USB Dock with Altura Photo Advanced Accessory and Travel Bundle : Electronics
First Look: SIGMA 60-600mm F4.5-6.3 DG DN OS Sports Lens | SIGMA Blog
Photographing Bighorn Sheep with the Sigma 60-600mm Sports Lens