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Lens Flare Artifacts in Narrowband Images

William Optics Redcat 51 Processing Deep Sky Artifacts M42
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Chase Davidson avatar
Chase Davidson avatar
Hi everyone,

I've noticed a few of my narrowband images have recently had some horrible lens flare when capturing at 300s (at least that's what I think it is). I thought it was a flats issue but after much experimentation, I've found flats do not fix the flare. I'm using a 2600mm on a Redcat 51, maybe it's overexposing? The individual subs do not show any of these artifacts, that's why I thought it may be a flat issue. Is there anything post processing that can fix this or should I retake at lower exposure time? See shots for examples below.
Thanks!
Chase

Flame Nebula Sulfur data light flareOrion Oxygen data (Orion Nebula has flare)
Rosetta Nebula Hydrogen Data light flare
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andrea tasselli avatar
andrea tasselli avatar
It isn't a lens flare, That's for sure. Read-out issues most likely.
Nlawrie94 avatar
Nlawrie94 avatar
I had these occur when calibrating files in pixinsight with WBPP. Using the Linear defects correction caused them to occur on my calibrated light files. They were not present on my RAW image files. A reprocess without "LDC" solved my issue.
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Chase Davidson avatar
Chase Davidson avatar
I had these occur when calibrating files in pixinsight with WBPP. Using the Linear defects correction caused them to occur on my calibrated light files. They were not present on my RAW image files. A reprocess without "LDC" solved my issue.

You are a hero, I’ll run wbpp now and let you know.
Chase Davidson avatar
Chase Davidson avatar
I had these occur when calibrating files in pixinsight with WBPP. Using the Linear defects correction caused them to occur on my calibrated light files. They were not present on my RAW image files. A reprocess without "LDC" solved my issue.

That did the trick, thanks so much!
Nlawrie94 avatar
Nlawrie94 avatar
Chase Davidson:
I had these occur when calibrating files in pixinsight with WBPP. Using the Linear defects correction caused them to occur on my calibrated light files. They were not present on my RAW image files. A reprocess without "LDC" solved my issue.

That did the trick, thanks so much!

Awesome!
Mauro Sturaro avatar
Mauro Sturaro avatar
From what I understand, "linear defect correction" is meant for readout problems typical of CCD sensors; it should not be useful for CMOS sensors.
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