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Old 20-04-2021, 10:16 PM
AdamJL
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AdamJL is offline
 
Join Date: Sep 2010
Posts: 2,100
Hi Darren
What program are you using? I found something similar when using Photoshop, but using a 32bit file. Doing a Levels stretch didn't move the histogram much. When I used Photoshop, I would do a stretch in 32 bit a few times, but then move onto 16 bit for more stretching and the majority of the work.
That said, it would be good for you to share some data so we can take a look!

edit: the above points are good as well. Increase your gain, but also your subs times as you're shooting at f/13.
That said, you should still have some useable data even at f/13 with 6min subs if you've got enough signal. What was the total integration time?
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