Amazon.com : Sigma 16-28 mm F2.8 DG DN Lens for Sony E Mount : Electronics
Sony Alpha Blog : Sigma 16-28mm F2.8 DG DN Contemporary
Amazon.com : Sigma 16-28mm f/2.8 DG DN Contemporary Lens for Sony E with Advanced Accessory and Travel Bundle | Extended 3 Years Sigma Warranty | 206965 | Sigma 16-28mm Sony E Lens : Electronics