I'm on a road trip. Since yesterday I noticed that the pictures have a dark area at the same spot. It's not because of the lens because I tried different lenses and the problem is always there. If the picture is overexposed, then the dark area also gets lighter, less noticeable.
Here is one example, which happens to almost every picture.
This is one example where it's very light and I can't see it unless I darken the highlight in LR.
Is this caused by dead pixels or possibly dirty CMOS? I'm on a road trip and away from city, therefore can't send it in to Canon to take a look.