Nikon has issued a service advisory for the newly released D810 SLR. Certain serial numbers of the camera are having issues with “bright spots” appearing in images while shooting long exposures. Nikon has identified the problem: “We have determined that some noise (bright spots) may on occasion be noticeable when shooting long exposures, and in images captured at an Image area setting of 1.2× (30×20)”.
Affected cameras can be identified by using serial number checkers for the U.S.A., EU and Japan. In the event that your camera is affected, Nikon are offering a free repair service.