My D800 just started having the BLURRY FOCUS SCREEN and it goes DIM. I also need to set EV = -1 to get decent exposure. But, the photos actually come out IN FOCUS when I view them on the computer. But, this is like someone who wears glasses taken them off and can notice someone standing in front of them, but not knowing who it is. It is frustrating. I sent my camera to NIKON this week. I should hear from them next week.