Hey everyone, I'm stumped on whats been going on with this camera. I mainly use my tokina 16-28 2.8 fx lens with it. Within the last 2 weeks I have seen my camera automatically switch to dx mode on its own I've tried to go into the options to switch back into fx mode, but that option is grayed out. I have physically turned off the camera and turn it back on at that point it will go back into fx mode. A few shots later in and it will go back into dx mode and then I have to start the process of turning it off again. I also realized it happens in dark settings. Has anyone come across this? I had the camera serviced by Nikon in Melville, NY about a month ago and I believe did a software update. Thanks to anyone who can help.