Hello, attached is a 100% zoom in on a raw file showing the spot in question. Can anyone pretty clearly ID if this is "sensor dust" of some sort or is perhaps a pixel issue? Yes, this spot shows up with different lenses on in the same location on the screen. Before I head down the road of getting a loupe, swabs and solution, I wanted to see if anyone out there can confirm one way or the other. I look at the sensor on one of our gh4s and cannot see anything resembling this spot with the naked eye. Thanks so much for taking the time to respond! Gratefully, Bill Snyder Create Mobile