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Kaliska

Star Halo(s)

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I'm getting these halos from a few of my filters.

Anything I should be doing to get rid of them?

OIII_Stack.jpg

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If you're using ZWO narrowband filters then this thread may help you out. OIII seems to be the worst offender.

Alan

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No, I'm using the 36mm Baader filters.

And i'm getting them on all the NB filters.

Edited by Kaliska

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Hi, what cam are you using and gain etc or on auto, I get them on my sx825 mono which maybe sensitive when using with a F6 and shorter scope and only when using an astronomic UHC with or without a ir cut addon. maybe help?

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I've got the ASI1600 MM Cool (Gain 139, Offset 21, Unity Gain) with the TSQ100 F5.8

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Hi it maybe a bad filter tho unlikely, f5.8 maybe but I don't always get them depending on the exp time and manual gain and offset, astronomic UHC used to have a issue with halos etc, but that was a few years ago now, and I don't get halos with any other filter bar the UHC, it  could be the ZWO has an issue with sensitivity or has gone "hyper-sensitive" like my QHY10 and they are sending me a replacement as they failed to fix it. maybe an issue with the cooling temp? somebody on here will now  hopefully?

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