My second image in narrowband, NGC6888 Crescent

[JSeaman]

I'm still learning a lot as I go but this is the Crescent from the last week or so

Total of 7 hours of exposure and 4 hours of darks: 15x10 minute Ha, 20x10 minute OIII, 8x10 minute SII
 

This image taught me meridian flips in EQMod, the importance of alignment between filters, how nice it is using narrowband when the moon is around and also showed that 3 hours+ makes a big difference on each filter. Hopefully the next image will be a little bit better as a consequence!