removing streetlight glow from corner of image

Questions and answers about processing in StarTools and how to accomplish certain tasks.
bobharmony
Posts: 20
Joined: Fri Jan 22, 2021 2:42 am

Re: removing streetlight glow from corner of image

Post by bobharmony »

So - it turns out there is an issue with the D5300 and rings. You can find that story (and one man's fix) here:

https://www.cloudynights.com/topic/7461 ... ric-rings/

After applying the fix described in that thread I got the following result.
HH and Flame dering DNG ST small.jpg
HH and Flame dering DNG ST small.jpg (369.77 KiB) Viewed 2121 times
It turns out the streetlight glow was not directly involved in that yellowish corner after all. It was a "feature" of the lossy compression used in the camera (the only choice for RAW files with the D5300) and the rings they created in the flats.

Bob
Scope: C6N
Cameras: Canon 60D (unmodded), Nikon D5300 (modded)
User avatar
admin
Site Admin
Posts: 3381
Joined: Thu Dec 02, 2010 10:51 pm
Location: Melbourne
Contact:

Re: removing streetlight glow from corner of image

Post by admin »

Thank you very much for the update Bob (and Mark for researching this; what a great read! :bow-yellow: ). It's rather infuriating that this is a camera issue.

I've added a link to the CN thread in the 'important preprocessing do's and don'ts'.
Ivo Jager
StarTools creator and astronomy enthusiast
Burly
Posts: 390
Joined: Mon Aug 31, 2015 7:06 am
Location: Northamptonshie uk

Re: removing streetlight glow from corner of image

Post by Burly »

Bob you are a star and may have solved why I’ve had issues with my flats using d5300 , I will look into this this evening.
Post Reply