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Old 28-08-2016, 09:32 AM
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Atmos (Colin)
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Atmos is offline
Join Date: Aug 2011
Location: Melbourne
Posts: 6,868
The were single subs so obviously the longer integration (3600s) will be cleaner than the other two but even when combining the 1200s and 2400s it still doesn't match the single 3600s. As Greg points out, this is all to do with the quite high read noise of the KAF-8300 sensor. The principle remains the same with the ICX-814, the closer you get to overcoming read noise in the dark areas the better contrast you'll get.

Basically, if you stack a lot of images where the fainter regions and buried in the read noise, no matter how many you stack together you'll not regain those faint regions.

Basically you just want to image to whatever your mount can handle repeatably. With my EQ6 that was 10 minutes.
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