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I am very new to this like you Ken and I think you are off too a great start. However I disagree with Brendan ( Purely in a constructive way) While I agree that 150 minutes total exposure will be better at 10 minute subs than 30 second subs I dont think that 1 10 minute exposure will be better than 300 30 second exposures. The signal to noise ratio, which is what we are concerned with in AP will be far greater in the stacked photo.
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