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Thread started 14 May 2012 (Monday) 04:23
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5D MARK III Sensor Problem Heads Up

 
KCY
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May 14, 2012 11:12 |  #16

Lowner wrote in post #14429511 (external link)
Yes, why?

nothing, nevermind I think I misinterpreted what you were saying.

I thought you were saying canon has a huge manufacturing issue with there sensors but you also admit it was a fact of life.

my mistake, sorry


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Numenorean
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May 14, 2012 11:15 |  #17

KCY wrote in post #14429568 (external link)
nothing, nevermind I think I misinterpreted what you were saying.

I thought you were saying canon has a huge manufacturing issue with there sensors but you also admit it was a fact of life.

my mistake, sorry

It isn't really a manufacturing problem.

The same thing happens with LCD displays and such, though they are much better these days.

If Canon only accepted sensors for the 5DIII which were 100% live pixels and didn't have tolerances, then the camera would probably cost $10,000 because it would just be so expensive to produce perfect sensors. With the remapping and software stuff that we have, you never notice a few dead pixels after processing and they don't affect image quality. It's not something that can just be "fixed".


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May 14, 2012 11:16 as a reply to  @ KCY's post |  #18

Sounds like a job for long exposure noise reduction to me. If the pixels are truly stuck hot, I would have thought they would appear on short exposures too.


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Numenorean
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May 14, 2012 11:17 |  #19

ejenner wrote in post #14429587 (external link)
Sounds like a job for long exposure noise reduction to me. If the pixels are truly stuck hot, I would have thought they would appear on short exposures too.

They might but might not expose enough to notice.


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dailydriver
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May 14, 2012 12:06 |  #20

Just do maual clean. Save you some time from shipping it back an forth. That's what they'll do only.


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May 14, 2012 12:12 |  #21

wow thats one too many, how about try video mode and see if your heart stop?


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Lowner
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May 14, 2012 12:16 |  #22

KCY wrote in post #14429568 (external link)
nothing, nevermind I think I misinterpreted what you were saying.

I thought you were saying canon has a huge manufacturing issue with there sensors but you also admit it was a fact of life.

my mistake, sorry

Canon are no better or worse than anyone else. There certainly is a problem, but the solution (I believe) lies in a total replacement of the existing sensor technology to make it easier to produce high quality data.


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Todd ­ Lambert
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May 14, 2012 12:58 |  #23

I don't know, I think this is a non-issue unless you're seeing tons of them. It certainly is a fact of life with digital sensors, and especially full frame sensors, and especially with longer exposures.

I've had tons on my 5D2, and not nearly as many on my 5D3, but I expect that as the ambient temperature rises with summer, I will start seeing more and more.

However, I never really see them anyways, as Aperture 3 pretty much identifies them and automatically maps them out upon import of my RAW files. Anything that it misses, which is rare, I an clone out.

I certainly wouldn't send my camera in for this unless it's truly excessive, otherwise all you're going to do is lose your camera for a period of time, and you'll get the camera back with a similar issue re-arrising at some point down the road.




  
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May 14, 2012 13:08 |  #24
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Dead Pixels are a fact of DSLR Life !!

Lowner wrote in post #14429511 (external link)
Yes, why?

They heat up more with long exposures and some will heat up faster than others.


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Higgs ­ Boson
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May 14, 2012 13:13 |  #25

IMAGE: http://i.qkme.me/353kci.jpg

A9 | 25 | 55 | 85 | 90 | 135

  
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May 14, 2012 13:28 |  #26

This is a problem and YES it does effect my images.

short or long exposure it don't matter they show longer exposure the more they show. The canon rep pretty much made it clear there was a problem and said others have seen this. My t3i does not do this and it's a cheaper made camera so why should the 5D mark III do this?

Yes all cameras have hot pixels or dead pixels but to have a bunch 4 or more on a new camera is not acceptable. Canon's policy is they will replace your sensor IF your raw image has issues the effect your final images.

LCD replacement is different there has to be a set number of dead or hot pixels and in a certain location


I WOULD STRONGLY RECOMMEND EVERYONE CHECK..

Set your camera up on a tripod , Play with your iso range keeping them all under 800 start with iso 200 and leave your shutter open for 15 seconds and so on.

If you have a bunch of pixels I strongly recommend sending your camera in to get a new sensor or repaired


I am not sure if this photo will do much justice


IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
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IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
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Uploaded with ImageShack.us (external link)


IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/png'


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You get the point that's way too many

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May 14, 2012 14:08 |  #27

Let's see these at 100% view to see if they are clumps of pixels, or still just individual ones. Single pixels will absolutely not show up in print considering you are mapping 300 or more pixels to every inch of print at full resolution size. This means that maybe you could see them if you got close enough and were printing posters, or cropped heavily and printed 8x10s.

Your rebel could indeed have it, but maybe the manual clean was run at one point and it mapped them out. Canon will replace if the number is considered outside their deviation of error regarding hot pixels, or if they just feel like being nice. I wish you luck, it costs you nothing to try anyways, but I wouldn't go around saying that this is a widespread Canon 5D3 issue, because it is not.


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Todd ­ Lambert
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May 14, 2012 14:11 |  #28

I do hope you're right, but I am just going to go on record as saying, you're peeing into the wind here... You can send your camera in, but you're going to get the exact same thing back, and most likely, no improvement on this "issue".

Hot pixels are a fact of life on all digital sensors and even more so on full frame sensors since they're larger and contain more.

But, I do hope that you are right and you get your camera back and never again see a pink or green pixel. Maybe you'll get lucky, who knows.

Me, I'm not holding my breath.




  
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May 14, 2012 14:13 |  #29

Todd Lambert wrote in post #14430512 (external link)
I do hope you're right, but I am just going to go on record as saying, you're peeing into the wind here... You can send your camera in, but you're going to get the exact same thing back, and most likely, no improvement on this "issue".

Hot pixels are a fact of life on all digital sensors and even more so on full frame sensors since they're larger and contain more.

But, I do hope that you are right and you get your camera back and never again see a pink or green pixel. Maybe you'll get lucky, who knows.

Me, I'm not holding my breath.

My bet is on the typical "electronic adjustments were made" statement on the repair order, and all they will do is some sort of mapping exercise. ;)

I wonder how many times that is what goes out to the customer and all Canon did was either do a complete camera hard reset, or did a hot pixel mapping exercise. They should just create a menu item for this very activity, called the "system reboot" option. You choose it, the camera completely resets everything, does a hot pixel mapping, and then shuts down. It would solve alot of warranty trips. :D


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May 14, 2012 14:25 |  #30

Well this is not the only issue I have been having too.

My 5D mark III freezes up from time to time. Also for some odd reason my 430Ex II on the hot shoe mount will lock up too. It's strange at first I thought it was an over heating issue.

I think I just might have a bad apple. This pixel issue really was my final straw

ALSO

I don't have to zoom in at 100% on some of my raw image thumb nails in "Digital Photo Professional" I can see the bright blue one clear as day before I even click the thumb nail and a few others without zooming in so with out post processing I am sure they would be visible on print.


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