Dave Etchells talks to Tom Sobey of Sigma about the new APO 200 - 500mm f/2.8 EX DG telephoto lens. See more PMA 2007 coverage at imaging-resource.com
Channel: News & Politics Uploaded: March 13, 2007 at 10:53 pm Author: imagingresource Length: 02:28 Rating: 4.76 Views: 91371 Tags: Imaging Lens PMA Resource Sigma Telephoto
