Single white pixel on CMOS? 5D Mk II

Grant

Grant

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I don't know of the concern of this, although I'm not happy that it appears on most of my images.

3178971187_8ed36267de.jpg


Any ideas? What can I do about it, other than the obvious cloning of each image, or dust removal tool. Is it definitely a dead pixel?
 
Agreed. I'd like to see a 100% crop of this.
 
It's had post processing applied though from RAW, so it's a little out of it.

Here's a JPG straight from camera

3178977557_2514197281.jpg


100% Crop
 
Gah, is a replacement too much to ask? I'd hate to lay £1860 on something that has this issue.
 
isnt there a way to possibly unstick a stuck pixel?:thinking:
 
If you upsize the image about 600% you can see it's square, so a pixel for sure I'd say.

I had one on a digi compact one time. It didn't always show, it depended on the underlying tone in the image, and when it did show I used to just clone it out.
 
ok, take it back and get a replacement, simple as.
 
CT said:
If you upsize the image about 600% you can see it's square, so a pixel for sure I'd say.

I had one on a digi compact one time. It didn't always show, it depended on the underlying tone in the image, and when it did show I used to just clone it out.
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So I'm silly for being bothered over one tiny pixel out of thousands and thousands?

I'd personally prefer to be without it, but I don't know on the terms of replacement, is one enough? Does there need to be 3-4 or more to warrant them replacing it? :shrug:
 
Grant said:
So I'm silly for being bothered over one tiny pixel out of thousands and thousands?

I'd personally prefer to be without it, but I don't know on the terms of replacement, is one enough? Does there need to be 3-4 or more to warrant them replacing it? :shrug:
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Hell no I don't think you're being silly, this is an expensive camera we're talking about.

I don't know what the current tolerance policy is quite honestly, I know at one time they used to quote a tolerance for stuck pixels in the specs. In your position though, I'd have a word with the vendor and see what they say. You can't have had it long?
 
As the camera is brand new I would return it to the shop you purchased it from and ask for a replacement. It may be possible to map out hot or stuck pixels, but as far as I know it's a job for Canon service.
 
Would resetting the camera help?

I had a hot pixel on my D300 when I bought it and got a replacement from dixons a few weeks later. Its one of the first things I check now as I've had dead pixels on TV screens, mobile phone screens and laptop screens.
 
I bought it online from eBuyer.

I wouldn't mind TOO much if it was just a straight photographing camera, but with the HD Video now too, it's very noticable :(

I'll try a few tricks that have been posted else where (manually cleaning sensor, without actually cleaning it apparently makes it remap dead pixels??) then contact eBuyer if no luck

Thanks guys.
 
Wow -- well as far as I know, that did the trick! Quick couple of tests and same pixel location (4344, 3129) and clear! I'll be damned.
 
Well thats a result, im not so sure you would have got it replaced, i know with TFT's they have an acceptable failure rate on dead/stuck pixels, not sure if its the same on sensors.
 
Matt T said:
Well thats a result, im not so sure you would have got it replaced, i know with TFT's they have an acceptable failure rate on dead/stuck pixels, not sure if its the same on sensors.
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Well if something isn't capturing the image properly then it's faulty. Sony's acceptance rate on its flat screens is one dead pixel per screen, any more and it goes back. They'll replace it. You can't take shots of the sky at night and have a mysterious new star appear in your images can you?
 
Grant said:
Wow -- well as far as I know, that did the trick! Quick couple of tests and same pixel location (4344, 3129) and clear! I'll be damned.
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Fantastic! How does that work then?
 
CT said:
Fantastic! How does that work then?
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I've no idea, apparently if you just set your camera to 'manual sensor clean' it automatically detects and re-maps dead pixels. I don't mind if I don't see the dead pixel, I'm a happy bunny
 
chewyuk said:
Good to hear - Interestingly I spotted a stack on my 30d after some recent long exposure shots. No auto-clean functionality on that.
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It's manual clean, not auto-clean. Have a try! (Just don't actually clean it)
 
I have a stuck pixel on my 400D, white like yours in the bottom left corner, it only shows up in jpeg images, RAW is completely clean. I can only asume it isthe mapping at work?
 
chewyuk said:
:) After the stories of self cleansing on here. I'll clone for now :)
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You can do the manual clean with the lens still on for the old pixel remap trick described above
Just select sensor clean from the menu
Not sure exactly how it works but the book will explain it - and you will get non of the actual manual clean problems normally associated with a clean. It is no different from doing a long exposure.
 
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