|
help with dark circle only with RGB filters
G'day team,
I wonder if anyone else has come across this?
I was stretching RGB channels last night and have found a dark circle seen bottom right quarter here. Its with an asi1600mm pro camera, efw mini filter wheel and 1.25" filters. I went back and its present across both of my OTAs, but I cant see it, even way over stretching my narrowband images. MY guess is that its a reflection? It looks to actually increase SNR, though, which is strange. Its in the same spot on all three channels.
Any suggestions on how to avoid it would be great!
|