Quote:
Originally Posted by Placidus
Rats! You guys have sharp eyes! As mentioned, pretty sure that the PN and the random red blotches are artifacts. The Aspen CG16M (or at least ours) occasionally imagines vaguely star-like artifacts that are transiently consistent from sub to sub, either in the lights or (worse) in the darks. If we dither by a huge amount between images, they go away with stacking and data rejection, but I think we're under-dithering. Buying a better camera is another option, but Santa would need serious buttering up.
Many thanks,
Mike and Trish
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Hi M&T,
The semi-random red blotches in the light frames could be RBI. A new 16803 camera might not help (or could be worse!). Large dithering steps is really the best approach (i.e. I am using 20 pixels in ACP, sometimes need even more with the Focus Max left over ghost donut).
If you are seeing them in the darks, are you doing darks right after lights?
That would be the worst case for injected RBI into the darks. The camera should be warmed up and then cooled back down (this empties out the RBI sites) before doing darks after lights.
Best,
EB