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Old 31-07-2018, 09:47 AM
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middy
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Join Date: Feb 2006
Location: Brisbane
Posts: 655
Keeping the histogram away from the right side is correct, to avoid saturating the bright parts of the image. I usually aim for around 70% across for the histogram.

The problem with using the fastest exposure is that you are capturing very little signal in each frame (the histogram would be well over to the left). You are then cranking the gain right up to the max to shift the histogram accross to the right. Using the gain to amplify the signal also amplifies the noise. Mars is a nice bright target so you can crank the gain right down (maybe even down to 30%, experiment a bit) and use a longer exposure time to catch more signal. Use longer exposure time to shift the histogram right and avoid amplifying the noise unnecessarily. The only time I needed to use 100% gain was when I was trying to image Neptune and Uranus, which are much harder to image.

I look forward to seeing your next attempt.

cheers,
Andrew
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