NOISE REDUCTION
This setting confused me to begin with...
Eg, if you take 3min shot, the camera then takes a DARK shot by itself for the same duration right after. It will clean up the noise that is generated for the shot duration that you just took. This means that you'll be waiting 6mins until you can take another shot...
I turn of this setting. The post-shot preview now pops straight up after the shot, and I use a program like Deep Sky Stacker to add my own DARKS.
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