It seems that the Sigma APO 200-500mm f/2.8 (Bigma) lens is already discontinued: Amazon: one is in stock for Canon, the Nikon version is out of stock, and the Sigma version is unavailable Adorama: special order B&H Photo: currently unavailable Camera Canada: no longer listed Foto Erhardt: no longer listed Calumet: no longer listed Wex … Continue reading The end of an era: the Sigma APO 200-500mm f/2.8 (Bigma) lens is already discontinued