I’ve been noticing that every time I shoot a wide field image, I get a heavy amount of noticeable noise/artifacting. Can someone help me identify what the source of this would be and how I can mitigate it? For reference, I only notice this occurring when I shoot with my Askar FRA400. I do not see this when image with my 120APO. Could it be a scope issue?
I’ve attached a close in zoom of my most recent capture of the Sadr region. Mixed in with the stars are some strange blobs that I haven’t been able to figure out. It’s less noticeable in the full FOV but can still be identified 📷 
Artifacts when shooting wide field
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How does the raw data look like? It looks like a denoising artifact.
Mikołaj Wadowski · Aug 25, 2026 at 03:48 PM
How does the raw data look like? It looks like a denoising artifact.
I’ve been thinking it could be this as well. It’s interesting because in the raw data, the image looks quite smooth prior to denoising. I suppose that could be it
Are you using NoiseXTerminator? I’ve noticed that when I use that program it produces stringing artifacts (that’s what I call it at least). I use DeepSNR and even Pixinsight’s very own ML denoise model at this point. You also seem to have some ringing artifacts caused by oversharpening. You may want to look into that as well.
Your picture looks beautiful when zoomed out though! But I would recommend trying out a different denoiser/decrease the strength, and maybe sharpen the image less.
Random idea: Do you see this on your tiffs as well? It may be a compression artifact. Just throwing things out there.
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