Pictures taken with the 2008 Sigma 150-500mm, F5-6.3 DG OS HSM model. This lens which I bought in August 2008, will replace my older Tamron 200-500.
A very nice lens which is stabilized, has the fast hypersonic motor and manual focusing override in autofocus mode. Much cheaper at 950 euros (the Nikon 200-400 costs 8 000 euros in France) and lighter than the Nikon models...RECENT PICTURES ARE AT THE END.