[Added repro version. Thanks for advice from all, especially Greg Bradley!]
Last new moon was the first time with my RC10 under dark skies, so I had a go at a couple of galaxies for a change (up until now I've been imaging at 530mm and mainly targeting nebulae).
Here's my first attempt at processing 7 hours of data for NGC 6744.
Scope: GSO RC10 @ f/8, 2000mm FL
Mount: AP900
Camera: Starlight Xpress H-18 mono
Filters: Astrodon E series Gen 2
Guiding: SX AO-LF and Lodestar
Focuser: Atlas
Image scale: 0.56 arcsec/pixel - a bit small, perhaps
Exposures: 24x10m L, 12x5m R, 12x5m G, 12x5m B
I've never imaged a galaxy before at this scale, so I'd really appreciate any helpful comments on things that would improve the image. I'm planning to reprocess it, but still deciding what aspects of the image I'd like to fix.
BTW, the little galaxy at the top left is NGC 6744A.
Thanks,
Rick.