any idea concerning dead pixel on pics

Started Jan 27, 2013 | Discussions thread
Le Kilt
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Re: any idea concerning dead pixel on pics
In reply to John Zeman, Jan 30, 2013

John Zeman wrote:

I have never performed a hot pixel mapping procedure with any of my cameras because I haven't needed to. If I go out and take a long exposure night shot and import that CR2 image into Lightroom, I'll briefly see the hot pixels appear but then they all disappear without me doing anything.
I don't know how Lightroom does it, but it has since version 1 and I'm using the current version 4.3

There will be a mapping done on all cameras at the factory.  When we do one, it adds any new ones to the list.

I've seen a new 5D2 that looked like they had forgotten to do it, maybe 20 or so hot pixels.  After the mapping procedure, magic - you could see them disappear as you describe (in Camera Raw here).

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