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If your willing, there are ways to virtually eliminate the need to stack darks, and this can make the workflow less hassle. How? Get a camera with deep cooling applied to the sensor. Most quality CCD cameras use snsor cooling, and a few DSLRs designed or modified for astrophotography also cool the sensor. You will still need offset/bias frames to map any hot pixels in the sensor but dark 'noise' drops off considerably when the sensor
temperture is held below zero.
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