I recently started encountering some weird artifacts on my images while post-processing. After I finish stacking my data across individual filters L, R, G, B, I notice the master frames each have this crescent-shaped artifact that only gets worse the further I go down the processing workflow. I’ve already applied a new set of Flat frames to address my dust spots, so I don’t really suspect this could be a dust artifact. But I’m sort of at odds figuring out how to solve for this.
Does anyone have any idea what this might be? Attached below are some examples.
Blue filter Master light
RGB combined image
📷 image.png
Equipment used:
Camera: ZWO ASIAir 2600MM Duo
Filters: Antlia Pro LRGB
Telescope: Skywatcher Quattro 250p 10”
