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No. Have a look at the spces for the camera
Gain0 = 3e- per ADU, Gain160=0.5e- per ADU. So gain0 has about 1/3rd the sentivity of unity gain, and gain160 about twice the sensitivity of unity gain
Just pick a gain to start with - 0 or unity. Better either of these than 160. You'll find 1-2min subs good for unity, and maybe2-3min subs for zero?
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