I know mine produces what looks like the Milky Way at most exposures longer than 1 sec, starting at ISO 200, even with all the NR set at their Max. It was sent back to Nikon a few months back. All they did was upgrade the Firmware, and it came back worse. so 7 weeks later I sent it back with about 100 Body Cap Pics of the Milky Way. It has been gone almost 4 weeks, maybe it went back to whatever Country it was made in? This is 2 strikes for Nikon, as the previous Camera was also a Lemon. At least the Z 9 can focus, something the D850 never did well. However, a bad Sensor, producing Hundreds of Stuck/Hot Pixels, really shows how Pi&& Poor Nikon's QC is