I took 3 hours of data on the flame nebula last night. Processed today and found that I have some sort of reflection. I have attached two over stretched images showing the issue.
Image 1: Is all three hours of data.
Image 2: A trial of only 20 minutes of data.
Darks for each, a set of bias and flats (I even took a second lot of flats today to see if it made any difference that was image 2)
Meade 6.3 reducer
Bintel T adapter
I also have a home made due shield which is lined with black material.
This is the same image train used a few nights ago for my M42 posted below which has no issues and they are both in the same area of the sky. I am in a fairly light polluted area but this has not changed in the last week.
Can someone help with what could be causing this issue and how I can either fix these subs or prevent this happening in the future.