A friend of mine has bought a D810 and is very disappointed with it. He showed me about 80 shots he had taken with it some 80% moving cars ( not talking about high speed just normal to slow ) I would say that all of the shots with any movement were out of focus. He states that having bought it he now finds out that it is known to be bad for this type of shot and it should have been pointed out to him. In my view ( he will not let me see the metadata ) he has little if any understanding of how to use the camera and it is down to aperture settings ( as screen is in focus but front of car not nor rear) and speed. He also used bracketing for every shot and when asked why as post development is with lihgtroom I was told that all pro's did this to get the best shot. However back to the original question has anyone had a problem with focusing.