Thanks guys!
Quote:
Regarding the dimming. When imaging over such long periods the histogram is you best friend. It will drop off before you have detected any high altitude cloud that may not even be perceptible to the eye.
If the situation arises where the live image dims during a capture you can compensate by adjusting gain or exposure on the run, however for continuity over a long period, keeping an eagle eye on the histogram is the go.
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Yeah, I had the histogram up while imaging (I had it a bit on the lower side to begin with, unfortunately
) and I did notice it decreasing a bit. I didn’t want to push the exposure or gain up because I thought it might make the animation look a bit discontinuous. The dimming doesn’t really bother me, I was just curious as to what might have caused it.