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Thanks Peter, what's the goal with the longer subs in this case? Lighter subs or less noise? I.e. should I be aiming for 4min subs keeping my ISO at 400 or dropping the ISO down to 200 and keeping the same brightness but improving the noise?
The reason I ask is because this time I purposely put effort into keeping my subs a bit darker so I get some actual colour into my stars.
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