Can't see M33 in my Bortle 6/7 skies with my 12" Dob or C925, so it was on my imaging to do list.
C925HD Edge at F7, ASI071MC UVIR cut filter, EQ6-R, OAG/PHD2 guided
953 OSC frames, 9.25 hours total, average ~ 35s per frame (changed exp during session so RN was swamped at 95%), dithered, 80 gain, moon < 25% over 5 sessions
Processed in Pixinsight: PhotometricColorCalibration, LocalNormalization, DrizzleIntegration, among many other things
I have difficulty with LP gradients so what I did differently in my processing this time was to use a "Noise Floor" to cancel out some mottling left behind from DBE, this is a cool way to help deal with background noise when flattening the field... if you want to read about it here are the particulars:
Edited by Peregrinatum, 07 December 2019 - 11:21 PM.