This is a practice master file for the dark nebula LDN 1089.
This image is great for advanced astrophotographers looking to process something challenging, not in the sense of it being too dim but having so much diversity in the brightness, colors, and textures of the gasses.
 
This was captured from our telescope under Bortle 2 skies. It totals 43 hours of integration time, and is overall an incredible master file.
 
Equipment used:
Camera: ZWO ASI2600MC
Telescope: Celestron RASA 8
Mount: 10Micron GM1000 HPS
Filters: N/A