Yesterday I imaged NGC 6960, and during processing I noticed a very obvious CIRCULAR gradient on my image?
I have attached a picture. I intentionally OVERDID the RGBK in Curves to highlight it more?
Is this from bad flats?
Is it from the filter?
Imaging setup yesterday:
These flats were taken 2 days ago, and did not produce any similar gradient on any of my Soul or Heart nebula images? Mount & OTA have not been moved or touched for the past 2 days, so did not take flats yesterday night?
The image on screen is after: DBE, background neutralisation, PCC, EZ DENOISE, HISTOGRAM STRETCH AND FINALLY STARNET.
Edited by Oscar Szentirmai, 22 September 2021 - 04:23 PM.