Just remapped 5700's CCD.....

Started Oct 15, 2003 | Discussions thread
baw Senior Member • Posts: 1,025
Number of hot pixels..

My observation was made too soon. I rechecked the 8s shoot I made
with the lens cap and indeed there were some white hotpixels.

8s second shots are not very relevant to detect hotpixels. With these extreme long exposure times you're sure to see some hot pixels. Thats why Nikon put Noise Reduction in their Coolpixes. In the 5700 manual Nilkon advises to use NR in shots longer than 1/30 s.

I just downloaded the Russian program and made a test with my brand
new (3 weeks) CP5400. DAMN!!! 81 bad pixels. Ok, let's try to click
on the remap button. 14 seconds after, the message "Your CCD was
successfully remapped". I took a couple of pictures and everything
seems to be just fine. Dave, I think this answers your question.

With 81 remapped hot pixels you probably got one of the best CCD's ever produced. Try another read of the map and see how many are remapped now. If you're camera had been on for some time before remapping you may find 512 remapped pixels now.

But now a question comes to mind, how often these hotpixel (new
ones) will appear on the CCD? How much time a camera has until the
512 bad pixels table will fill up?

Impossible to predict. You can reduce the number of remapped pixels by cooling the camera a couple of hours in a cold garage or something like that. Than connect the camera to your computer, remap and you should have the lowest possible remap number for your CCD at that time.

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N i k o n 5 7 0 0 - S u n p a k P Z 5 0 0 0 A F


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