Eos 350D/XT Dead/faulty pixels at 200 ISO and up

[Paul Engen]

I've just bought a Canon Eos 350D. As I've experienced dead pixels on my Powershot A95, I checked this camera just to be shure.

I did the test with the lens-cap on, with a 1/4 - 1/30 - 1/60 sec exposure, and checked all the ISO values at these shutter speeds. At 100 ISO every thing was ok. But at ISO 200 and up I found a clear blue dot in the left part on all the pictures (same position on all pictures). It is about 24 pixels big (and very present when part of a shadow area - in ordinary pictures). At these ISO values I also found a single dead pixel further into the picture.

I turned the camera in and got my money back. But I liked the camera, and are considering bying another specimen. Can you 350D owners take a check on your cameras and see if you can find the same fault? If this seems to be a common problem, I will not buy this model.

This message goes to all you thinking of buying a new camera: ALWAYS CHECK THE SENSOR FOR FAULTS! :-)

[pierrot]

This message goes to all you thinking of buying a new camera: ALWAYS CHECK THE SENSOR FOR FAULTS!
That's a matter of common snese. Who would buy a camera and not check that it is in perfect condition?

[Jackal]

My XT doesn't have any hot pixels even at 30 seconds exposures (with noise reduction off of course). :)

But yeah read this:
http://webpages.charter.net/bbiggers/DCExperiments/html/body_hot_pixels.html
Which was posted in the other thread that you made which was about the same thing as this one....

[FlyingPete]

I've just bought a Canon Eos 350D. As I've experienced dead pixels on my Powershot A95, I checked this camera just to be shure.

I did the test with the lens-cap on, with a 1/4 - 1/30 - 1/60 sec exposure, and checked all the ISO values at these shutter speeds. At 100 ISO every thing was ok. But at ISO 200 and up I found a clear blue dot in the left part on all the pictures (same position on all pictures). It is about 24 pixels big (and very present when part of a shadow area - in ordinary pictures). At these ISO values I also found a single dead pixel further into the picture.

I turned the camera in and got my money back. But I liked the camera, and are considering bying another specimen. Can you 350D owners take a check on your cameras and see if you can find the same fault? If this seems to be a common problem, I will not buy this model.

This message goes to all you thinking of buying a new camera: ALWAYS CHECK THE SENSOR FOR FAULTS! :-)

This is not a common problem, in fact sounds quite strange that it was such a large area. Most hot pixels I have seen are singular, and only really show up in longer exposures (several seconds or more).

Give the 350 another go!

[nater]

I've used 3 XTs, and 2 of the 3 had no dead/hot pixels. Give it another try. :)

[badrotation]

my 20 d has two hot pixels on long exposures, one red, and one blue. I dont let them bother me at all, since I dont normally take photos over 15 seconds of exposure. When I do, I just use the clone tool in photoshop to quickly get rid of them.

[Paul Engen]

Thanks everybody! I've now got in touch with a shop that would let me test their camera before I buy it (and use their computer :-). Yes, I agree that one single stuck pixel is no big problem, but this was "serious" stuff :( Otherwise this was a very good camera, though the viewfinder was way too small! But I can live with that due to the good prize :-)

[CyberPet]

I only found a hot pixel (and I mean hot) in an image taken at f/22 during 30 seconds, and that was after about uhm... 30 minutes of pictures taken with those settings (at ISO 200).

So I'd say my pixel was "hot" and have never seen it again.... maybe since I haven't used such long shutter speeds since then. :D