Even though i have a 400/2,8. There are sometimes situations when i need to crank up the ISO a lot. Like today. Overall I'm amazed with how good todays professional cameras are. When i started shooting sports 2008. I could never dream about using ISO 12800 at all. Even less getting this kind of result.
About 400/2,8. I used a 400/4 DO before. It´s so well used. And beaten up. That it´s time to retire it. So i just upgraded to a used 400/2,8L IS USM.
Just love how clean backgrounds you can get with it. And the sharpness is nothing but stunning.