At first I did not believe my D800E had any left focus issue until today. A week ago my D800E was sent to Nikon El Segundo for sensor cleaning and while its there I had nikon look into the focusing operation. To my surprise Nikon did a fine job, the images now are much more crisp (Flickrs does not help in this matter). An add bonus, my lens have more of a \"snap\" racking focus. seems quicker!