Quote:
Originally Posted by glend
What causes the diffraction spikes to turn into a string of dots? Beautiful otherwise but i find the lines of dots distracting.
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Hi that's my dual vane spider. I don't mind it, it's either that or large spikes on bright stars which I don't like. It sort of disappears when other channels are blended in
Quote:
Originally Posted by Atmos
See those little black spots in this crop? They're scattered all over your image. To get rid of these you just need more subs, four isn't really enough to get a good and clean rejection going.
I used to have a QHY9 which has the same KAF-8300 sensor as your SBIG. It is a great sensor but even at -25°C is it kinda noisy. Some more subs will smooth all of those little dots  With enough subs and dithering you don't even need to worry about darks with the KAF sensors.
Glen, I think it's caused by the Ha filter, I notice the same thing in my refractor when I am focusing on mag 3-4 stars with my bahtinov mask. |
Thanks I get it. That's a result of improper calibration. I'll redo it again when I add more data and it shouldn't show up even with less data
Cheers
Alistair