Quote:
Originally Posted by kens
The 1600 has a 12bit ADC so you need to multiply by 16 rather than 4 so your target values should be 4x higher.
Also for the 1600: RN=0.482*Gain (in e-/ADU) + 1.178
At unity with an offset of 21 I get a target value of 777 as the RN is 1.7
A histogram peak at 2800 is quite high so you would get more clipping than if you targetted 700 as per the calculation for 70/21
Don't go higher in gain. 30s subs are already short and you still need the integration time.
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Okay, Ken, that makes more sense, Thanks.
So is the general idea to keep the read noise separate from the sky fog, exposing just enough that you keep the rest of the dynamic range free for signal?
Cheers
Markus