After comparing with a fellow photographer with the same lens, I've come to the conclusion that my 80-400 VR needs to be calibrated. The reason being softness out at the longer focal lengths. Now I know the 80-400 isn't tack sharp out at 400, but shots taken in the f8 to f10 range, and shutter speeds 1/500 and greater, shouldn't be completely useless. Not to mention I'm noticing parts of the image in the left bottom side of the frame are soft and often times blurry. I also know it's not the camera body because I recall having similar issues on my D50.
So how do I go about getting my lens calibrated?