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Dead Pixels on a NEW 1DS Mark II

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BuLLets

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I picked up a 1DS Mark II last week and after making some test shots and noticing dust I found what I think are 2 dead pixels. They are near each other and look to be seperated by one diagonal pixel. In most shots they appear to be black. Though I just took another pic with white clouds (out of focus) in the background and I don't see them. What's the deal with dead pixels? I've read that 'all' senosrs have them and the ones that are dead are turned off at the factory before the camera is shipped out. Any one else finding dead pixels on brand new cameras? My serial number is in the 307XXX range and it had 1.0.2 firmware on it when I got it and upgraded it to 1.0.3. I also found the 'check it' utility that examines .cr2 files and gives you the acutally count which was 3 over the file numbering scheme. I was starting to think I got someone elses reject. But with the count only being 3 over I ruled that out.

Thanks
Doug
 
As far as i know almost all cameras, incuding brand new have dead pixels. My brand new 20D had 8 showing at iso 3200 on a test shot, however none at iso 100. At what iso do those pixels start appearing on your test shots? If it doesn't show till iso 800 i wouldn't worry about it. In my opinion having 3 dead ones, and 17 million good to go is a fairly good ratio. On the other hand i have a 1dsm2 in the mail, and hope for the least amount of dead pixels, so i do understand your concern. You always have the option to send it in right before waranty period ends, that way you can wait out if any others will show up.
BuLLets said:
I picked up a 1DS Mark II last week and after making some test
shots and noticing dust I found what I think are 2 dead pixels.
They are near each other and look to be seperated by one diagonal
pixel. In most shots they appear to be black. Though I just took
another pic with white clouds (out of focus) in the background and
I don't see them. What's the deal with dead pixels? I've read that
'all' senosrs have them and the ones that are dead are turned off
at the factory before the camera is shipped out. Any one else
finding dead pixels on brand new cameras? My serial number is in
the 307XXX range and it had 1.0.2 firmware on it when I got it and
upgraded it to 1.0.3. I also found the 'check it' utility that
examines .cr2 files and gives you the acutally count which was 3
over the file numbering scheme. I was starting to think I got
someone elses reject. But with the count only being 3 over I ruled
that out.

Thanks
Doug
Click to expand...
 
I see them at any ISO. I first noticed them while shooting indoor flash at ISO 100. I saw a blob in all every pic and was wondering what it was. After cleaning the sensor and taking some more test shots the blob was gone but then I ran into these two dead pixels. Identifed their area using Canon's viewer and then went back and examined all my previous shots and they all had the 2 'dead' pixels.
 
As you said, dead and hot pixels are not uncommon. Set the ISO high enough or take a long exposure and you'll find a few on nearly every sensor. My D60, 10D, and 1D Mark II all went to Canon to have bad pixels mapped out. It's annoying that Canon doesn't give us a utility to do this ourselves like Olympus, but I suppose one trip to Canon isn't that inconvenient.

As for the "check it" utility you mentioned, what does it have to do with dead pixels?
BuLLets said:
I picked up a 1DS Mark II last week and after making some test
shots and noticing dust I found what I think are 2 dead pixels.
They are near each other and look to be seperated by one diagonal
pixel. In most shots they appear to be black. Though I just took
another pic with white clouds (out of focus) in the background and
I don't see them. What's the deal with dead pixels? I've read that
'all' senosrs have them and the ones that are dead are turned off
at the factory before the camera is shipped out. Any one else
finding dead pixels on brand new cameras? My serial number is in
the 307XXX range and it had 1.0.2 firmware on it when I got it and
upgraded it to 1.0.3. I also found the 'check it' utility that
examines .cr2 files and gives you the acutally count which was 3
over the file numbering scheme. I was starting to think I got
someone elses reject. But with the count only being 3 over I ruled
that out.

Thanks
Doug
Click to expand...
 
Check it has nothing to do with dead pixels other then the paranoia I have thinking the camera was around the block, used and rejected by some "former" owner. Apparently that's not the case since "check it" determined that there were only 3 additional accuations on the camera as compared to the file numbering scheme.
Derekasaurus Rex said:
As for the "check it" utility you mentioned, what does it have to
do with dead pixels?
BuLLets said:
I picked up a 1DS Mark II last week and after making some test
shots and noticing dust I found what I think are 2 dead pixels.
They are near each other and look to be seperated by one diagonal
pixel. In most shots they appear to be black. Though I just took
another pic with white clouds (out of focus) in the background and
I don't see them. What's the deal with dead pixels? I've read that
'all' senosrs have them and the ones that are dead are turned off
at the factory before the camera is shipped out. Any one else
finding dead pixels on brand new cameras? My serial number is in
the 307XXX range and it had 1.0.2 firmware on it when I got it and
upgraded it to 1.0.3. I also found the 'check it' utility that
examines .cr2 files and gives you the acutally count which was 3
over the file numbering scheme. I was starting to think I got
someone elses reject. But with the count only being 3 over I ruled
that out.

Thanks
Doug
Click to expand...
Click to expand...
 
I can understand being a little paraoid about an $8,000 purchase. :) But it's like they say, 2 out of 16.7 million ain't bad. :) But if it bothers you, send it to Canon and I'm sure they can map out the offenders. Just be very explicit about the pixels you want fixed, and perhaps include a CD with an image that shows their exact location. One of my cameras had to make several trips because the tech overlooked a couple of hot pixels.
BuLLets said:
Check it has nothing to do with dead pixels other then the
paranoia I have thinking the camera was around the block, used and
rejected by some "former" owner. Apparently that's not the case
since "check it" determined that there were only 3 additional
accuations on the camera as compared to the file numbering scheme.
Click to expand...
 
Does anyone here know if noise reduction has any affect on the appearance of dead pixels?

Just curious. What happens, if anything, to the dead pixels when you turn NR on or off?
 
Different applications handle bad pixels differently. My 1Ds II has a noticeable pixel that is always pink if I use DPP, but since the Photoshop CS plugin supported the 1Ds II I've been using that instead of DPP and haven't noticed the dead pixel since then. I think PS CS's algorithms for importing RAWs are far superior to DPP's.
 
If I use PS and import the .cr2 files the dead pixels don't show up whatsoever. So, I suppose PS is stripping them out. If I use Canon's Digital Pro to convert the .cr2 to a tiff, then import it into PS the dead pixels are there. I also wonder how many dead pixels are already mapped out by Canon in the factory. Anyone have any sort of software that could give us an idea?
stevei said:
Different applications handle bad pixels differently. My 1Ds II has
a noticeable pixel that is always pink if I use DPP, but since the
Photoshop CS plugin supported the 1Ds II I've been using that
instead of DPP and haven't noticed the dead pixel since then. I
think PS CS's algorithms for importing RAWs are far superior to
DPP's.
Click to expand...
 
I just got my 1Ds Mark II. How did you test the dead pixels?
Did you take a pic with jpeg or RAW?

Thanks ,

Jim
BuLLets said:
I picked up a 1DS Mark II last week and after making some test
shots and noticing dust I found what I think are 2 dead pixels.
They are near each other and look to be seperated by one diagonal
pixel. In most shots they appear to be black. Though I just took
another pic with white clouds (out of focus) in the background and
I don't see them. What's the deal with dead pixels? I've read that
'all' senosrs have them and the ones that are dead are turned off
at the factory before the camera is shipped out. Any one else
finding dead pixels on brand new cameras? My serial number is in
the 307XXX range and it had 1.0.2 firmware on it when I got it and
upgraded it to 1.0.3. I also found the 'check it' utility that
examines .cr2 files and gives you the acutally count which was 3
over the file numbering scheme. I was starting to think I got
someone elses reject. But with the count only being 3 over I ruled
that out.

Thanks
Doug
Click to expand...
 
I had seen a blob of somthing in all my pics. Thinking (hoping) it was just dust I cleaned the sensor and took some additional pics of a mostly blank wall. Looking at the images at 200% I found the 2 dead pixels, scaling back to 100% the pixels were still visible. The dust glob spot ws gone but the newly discovered dead pixels were found. It was just a visible scan that lead to them looking to see if the dust was gone. The shots where I discovered the dead pixles were all shot in raw. After finding the location of the dead pixels I went back to the first shots I took which were all in .jpg and found them there as well.
Jim Wang said:
I just got my 1Ds Mark II. How did you test the dead pixels?
Did you take a pic with jpeg or RAW?

Thanks ,

Jim
Click to expand...
 
Thank you for your information. I will do some test and let you
know what I find. Regarding your concern about whether
the camera was a rejected one, I had exactly the same concern
myself. I examined the box and pieces inside carefully
before I opened them and I
found every piece was not opened before. So I believed it was
a brand new from the manufacturer. However, there is no guarentee
that brand new will not have a problem.
BuLLets said:
Jim Wang said:
I just got my 1Ds Mark II. How did you test the dead pixels?
Did you take a pic with jpeg or RAW?

Thanks ,

Jim
Click to expand...
Click to expand...
 
BuLLets said:
I picked up a 1DS Mark II last week and after making some test
shots and noticing dust I found what I think are 2 dead pixels.
They are near each other and look to be seperated by one diagonal
Click to expand...
I tried to attach a image so you could see it, but I have not figured out how to do that. I am getting vertical banding in my EOS 1Ds MK II images. Is this similar to what you are seeing?

IF I am in the wrong thread please redirect me. Also how can insert an image into an reply in this forum?

Thanks,

Jim

[email protected]
 
Nope, I've noticed no banding yet. I'm working on the dust and dead pixel problem first! This thing is a dust magnet to say the least. I was out shooting with the 100-400 when I got home and uploaded the pics everyone of them had a huge blob near the bottom right edge. I used the giottos to remove it, took 3 tries. And there's new dust spots here and there now.. :( Nothing as huge though. Also by the way, when cleaning it I noticed that the mirror is up tighter on one side as compared to ther other when locked up. Is this normal?
Jimmy T said:
I tried to attach a image so you could see it, but I have not
figured out how to do that. I am getting vertical banding in my
EOS 1Ds MK II images. Is this similar to what you are seeing?

IF I am in the wrong thread please redirect me. Also how can
insert an image into an reply in this forum?

Thanks,

Jim

[email protected]
Click to expand...
 
BuLLets said:
If I use PS and import the .cr2 files the dead pixels don't show up
whatsoever. So, I suppose PS is stripping them out. If I use
Canon's Digital Pro to convert the .cr2 to a tiff, then import it
into PS the dead pixels are there. I also wonder how many dead
pixels are already mapped out by Canon in the factory. Anyone have
any sort of software that could give us an idea?
Click to expand...
Just have look on my previous post concerning mapping of dead/hot pixels: http://forums.dpreview.com/forums/read.asp?forum=1032&message=11517244
 
Yikes that's scary. I've done the 'body cap' test and found no hot pixels. I don't recall if I did a lot of iso varying but, after seeing your problem I do it and retest. Found a piece of software that looks for hot/dead pixels after shooting with the body cap on. The program did support some raw files but not the .cr2's on the 1ds mk2, so I had to use .jpgs in the test. The results didn't seem to make sense as the recorded images were black and for hot pixels I suppose that would work fine. But, for dead I don't see how software that looks for highlights on a pixel level can spot a dead one less it was white.
Woodquarter said:
Just have look on my previous post concerning mapping of dead/hot
pixels:
http://forums.dpreview.com/forums/read.asp?forum=1032&message=11517244
Click to expand...
 
I downloaded the software and did the cap-on test. Two black jpeg
files were examined. The software found 2 hot pixels and 0 dead in
the first file and 6 hot pixels and 0 dead in the second one. I visually
examined the files, there are a "large" red dot and a small white dot visiable
in both files. I also did some white background test, but my white
paper seems not bright enough and I did not find anything. I will do
more white test during the weekend. My series number is 310753.
So far I am not that concerned yet.

Thanks for the information and the link.

Jim
BuLLets said:
Just googled it here's the link...

http://www.starzen.com/imaging/deadpixeltest.htm
JC JC said:
BuLLets said:
Found a piece of software
that looks for hot/dead pixels after shooting with the body cap on.
Click to expand...
What is the name of the software? Do you have a link?
Click to expand...
Click to expand...
 
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