D800E long exposure noise

Started Jul 16, 2012 | Discussions thread
Astrophotographer 10
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Re: But is LENR always the answer?
In reply to D Sharp, Aug 19, 2012

In your case it may be better to create a library dark and use them later on.

You can batch process dark subtraction of a large number of images at the same time.
Images Plus does all that.

Another approach is the free program someone linked here - pixelfixer. Never used it but perhaps that will work.

Another possible fix is hot/cold pixel removal in CCDStack.

The most accurate answer is always a dark subtract and then the ultimate is a well constructed master dark of 16 subexposures combined with sigma reject combine (to remove spurious one off defects that aren't repeatable thermal noise which is the same image to image). Believe it or not cosmic ray hits can also show up in images. Not sure about DSLRs but definitely in CCD cameras during long exposures. Not that common but there will be a few in 10 images. They look like little white streaks.

Greg.

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