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Old 03-02-2014, 06:07 PM
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alistairsam is offline
Join Date: Nov 2009
Location: Box Hill North, Vic
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[QUOTE=Bassnut;1054084). I know that in dark skies, read noise is always the dominating factor.[/QUOTE]

I'm new to these concepts, pardon my ignorance, are you'll able to explain in simplistic terms what the above means?

We go to dark skies to image without light pollution where it would normally wash out the background.

So how are dark skies worse than brighter skies in terms of read noise or do you mean overall noise in several short subs as opposed to noise in fewer long subs as there are fewer reads?
Any links explaining thesr concepts would also help

When you say we can achieve the best snr with the calculated target adu, wont longer subs increase background values, so shouldn't we measure signal relative to noise and stop where signal doesnt increase significantly not just background values which could be LP? Are we really measuring noise?

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