I'm sure this topic has been covered a bazillion times on CN - however this is the Bazllion and 1 time:
I've recently started shooting w/ a ASI183mcPRO astro cam. I also live outside NYC and have an L-Pro (Optolong) filter on my rig. All my images are coming up BLUE (expected as the filter is blue). But how do I compensate for this? On a DSLR, I'd shoot a custom white balance and apply to all frames. Here, I'm stumped. I shot M13 last night and the entire thing was yellow/green (due to the blue fitlter). I have no idea how to correct this in PixInsight nor in Photoshop - as the tint is just far too much for a normal correction.
Any help would be greatly appreciated.
ZWO ASI183mcPRO cam
L-Pro Optolong Filter for LP
Processing in PixInsight and Photoshop - had to give up Lightroom due to no XISF or FITS reader for Photoshop/Lightroom
Acquistion software is "AstroImager" or "FireCapture". I'm having issues w/ ZWO's native package for other reasons and have stopped using it.
Thanks in advance