Hi,
I would use it for wildlife. Anyone using it with a TC 1.4x? I was going to but the Sigma 500 f/4.5 but now this 400mm f/2.8 is a real alternative!
I know it's a heavy beast but from what I read the quality is outstanding. The other negative point is that Canon is not supporting it anymore thus if it breaks, I need to go to a specialized shop.
Price: 2000$ ...sounds too good to be true 
Let me know what you think!?

