Sigma 50-500mm f/4.5-6.3 DG OS HSM APO LensPosted by Digital Photography Live Date November 17, 2012 Product Summary Model name: Sigma 50-500mm f/4.5-6.3 DG OS HSM APO Focus Type: Autofocus / Manual Format : Full Frame / APS-C / Crop Sensor Mounts: Canon | Nikon...