This a mixed focal length image combining high resolution luminance data (0.65"/pixel) with previously taken lower resolution undersampled RGB data (3.39"/pixel). The object is of course M101, the Pinwheel Galaxy, a grand face-on spiral galaxy in Ursa Major.

Imaging Camera: QSI640wsg
Imaging Scope: Celestron 9.25"Edge HD at F/10 and Takahashi FSQ 85
Guide Camera: SX Lodestar
Mount: Avalon M-Uno Fast Reverse
Filters: Astrodon Gen II LRGB
Exposure: 5 hours Lum (Edge), 5 minute subs unbinned, 60 min each RGB (FSQ) 5 minute subs unbinned
Processing: CCD Stack and PS CC
Date: 5/8/18, 4/19/16