If you were to view @ 100% crop at the blades of grass on the foreground... how do they look? They seem rather sharp-ish resized. If the foreground grass is sharp, then that means the camera was focusing on the foreground. And if that's the case and if you expect 100 yds worth of DoF @ f/2.8, you have a gross misunderstanding of optics and exposure setting.
I want to say this in the least offensive way possible... but "you've got a pixel-peeping problem."





