Hi Daniel,
I’m going to try and make a diagnosis without all of the information. Essentially it seems like essentially what is going on is that the lensing isn’t corrected evenly . This is exacerbated by the I/R cut filter calming the red end of the spectrum but not the U/V ( blue ) end. This is giving you the halo all in blue end. I guess it’s all a matter of taste and I agree your glow is probably slightly too large, but some glow around your stars can give your image a dynamic feel and add depth. It appears that you’re imaging though a refractor from the look of the image which I must admit is not my area so I could be taking from my rear end....
Cheers
Ryan
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