dead pixels


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stl

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Apr 7, 2002
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#1
how do u guys test for dead pixels? i heard can be done by using the lens cap and take a black pic and see how many are not black... i got some red, blue and dunno green or white pixels leh...

also how can i count the percentage of dead pixels? i think above a certain percent, the company then can change the cam rite?
 

jtnet

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May 18, 2003
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#2
Originally posted by stl
how do u guys test for dead pixels? i heard can be done by using the lens cap and take a black pic and see how many are not black... i got some red, blue and dunno green or white pixels leh...

also how can i count the percentage of dead pixels? i think above a certain percent, the company then can change the cam rite?

here's the link:
http://forums.clubsnap.org/showthread.php?s=&threadid=36060&highlight=dead+pixel
 

Nutcase

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Feb 27, 2003
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yeah - talk about wear and tear - I got 1 dead pixel on my 5700 within 3 hours of using it!!!! :angry:

All fingers crossed - hope there is no more to come. :(
 

May 24, 2003
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#8
Originally posted by Nutcase
yeah - talk about wear and tear - I got 1 dead pixel on my 5700 within 3 hours of using it!!!! :angry:

All fingers crossed - hope there is no more to come. :(
At least it is still under warranty. I got one dead pixel in my CP5000 within 3 months and had the CCD remapped by Nikon. My camera then developed a very hot pixel (ie will appear even in short exposures after continuous shooting) at 15 months. Nikon wanted to charge me S$100 to remapped the CCD out of warranty!!! :eek:
 

E-Lim

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#9
how long will it take for them to fix dead pixel?
 

Nutcase

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#10
Originally posted by linse
At least it is still under warranty. I got one dead pixel in my CP5000 within 3 months and had the CCD remapped by Nikon. My camera then developed a very hot pixel (ie will appear even in short exposures after continuous shooting) at 15 months. Nikon wanted to charge me S$100 to remapped the CCD out of warranty!!! :eek:
So they actually agree to fix 1 dead pixel under warranty?

I had the impression that they will only fix it if > x number of dead pixels.

This is good information! :thumbsup:
 

May 24, 2003
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#11
Originally posted by Nutcase
So they actually agree to fix 1 dead pixel under warranty?

I had the impression that they will only fix it if > x number of dead pixels.

This is good information! :thumbsup:
They don't actually replace the CCD. They just remap the CCD so that the defective pixel is not used in the reconstruction algorhythm.
 

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