NOTE: Possibly solved! However still seeking some related/follow-up advice - Please see my update (1st April) further down the thread.
Hi, I'm seeking assistance to diagnose an image of M83 I recently took. The specific issue I'm having is a strong form of "smeared background noise"
I've tried multiple ways of stacking the data, both with darks/flat etc. to no avail. The attached image has a simple "medium curve" applied. No matter what I do to the initial stacking, the final result always contains a heavy background smear (the individual images appear fine)
Has anyone encountered this type of issue with a DSLR?
Image details:
20x300sec (guided, 8" LX200 ACF)
Canon 600D
ISO 800, shot in RAW
Stacked in Nebulosity 3
I've previously shot with higher ISOs (6400) and shorter subs so I've never encountered this specific issue before.
Thanks, Evan