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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 02 Aug 2012 (Thursday) 19:22
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Dead pixels on my 5D ?

 
genjurok
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537 posts
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Aug 02, 2012 19:22 |  #1

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.

IMAGE: http://farm8.staticflickr.com/7126/7701224880_063ef20393_b.jpg


This is one example where it's very light and I can't see it unless I darken the highlight in LR.

IMAGE: http://farm9.staticflickr.com/8150/7701287464_8d5ff5bd9a_b.jpg

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.
Thanks!

6D
Canon 17-40mm f/4L | Tamron 28-75mm f/2.8 | Canon 70-200mm f/2.8L IS II
Canon 50mm f/1.8 | Sigma 50mm f/1.4 | Canon 100mm f/2
580 EX | 430 EX | Pixel King Pro wireless radio trigger and receiver (x2)

  
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maatt
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Aug 02, 2012 19:46 |  #2

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.


e=mc ** 2

  
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genjurok
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Aug 02, 2012 19:54 |  #3

maatt wrote in post #14806801 (external link)
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.


6D
Canon 17-40mm f/4L | Tamron 28-75mm f/2.8 | Canon 70-200mm f/2.8L IS II
Canon 50mm f/1.8 | Sigma 50mm f/1.4 | Canon 100mm f/2
580 EX | 430 EX | Pixel King Pro wireless radio trigger and receiver (x2)

  
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maatt
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Aug 02, 2012 20:15 |  #4

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.


e=mc ** 2

  
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saintz
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Aug 02, 2012 20:20 |  #5

That is dust.


Sony A6000 | 18-55 | 16-50 | 50 f1.8

  
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genjurok
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Aug 02, 2012 20:24 |  #6

maatt wrote in post #14806913 (external link)
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. :D


6D
Canon 17-40mm f/4L | Tamron 28-75mm f/2.8 | Canon 70-200mm f/2.8L IS II
Canon 50mm f/1.8 | Sigma 50mm f/1.4 | Canon 100mm f/2
580 EX | 430 EX | Pixel King Pro wireless radio trigger and receiver (x2)

  
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kasey
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Aug 03, 2012 01:56 |  #7

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.


  
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Lowner
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Aug 03, 2012 04:08 |  #8

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.


Richard

http://rcb4344.zenfoli​o.com (external link)

  
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neil_r
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Aug 03, 2012 04:10 |  #9

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


Neil - © NHR Photography
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Dead pixels on my 5D ?
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