Dead pixels on my 5D ?

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.

Looks more like a spec of dust or something over a dead pixel. Dead pixels I've seen were little red dots and not that big.

maatt wrote in post #14806801
Looks more like a spec of dust or something over a dead pixel. Dead pixels I've seen were little red dots and not that big.

Thanks!

Probably dust cause the first day pictures were totally fine. But I frequently changed lenses on the trip , mostly between the tamron 17-35 and the 70-200 f/2.8 lens. Then the second day I noticed the problem.

Have you taken the lens off and taken a look at the sensor and mirror? And if you haven't given it a good cleaning recently, I'd tried that before sending it over to Canon.

That is dust.

maatt wrote in post #14806913
Have you taken the lens off and taken a look at the sensor and mirror? And if you haven't given it a good cleaning recently, I'd tried that before sending it over to Canon.

Thanks guys!

Yes, I did take the lens off and look at the mirror and sensor. They looked fine to me. But I"m not expert on this.

Agree with the above posters, this has to be dust. Strange thing is that the outline of the dark area is not well-defined, which seems to suggest that the dust has some distance away from the sensor.

Theres more than one dust mote, if you look carefully there are at least two others. They are a pain, but a fact of life in the digital photography age.

Whether you go the wet cleaning route or the dry is up to you, but it needs attention.

Dont worry about the mirror any dust on there will not affect your images.