I bought an refurbished 7D for my son. A few days ago, he was on an airshow and took some shots.
But he is very disappointed, because the pictures are very noisy.
He shot faster then 1/1250, Auto Iso, Exposure: spot, +1/3-2/3.
So I called the Canon service center, who told me that this is normal for the 7D.
Is it really? Which Iso is maximum to get no noisy pictures?
As an attachment, one example, where the noise is extremly visible. This frame shows the full picture