I am working my way through synthetic Flats and a different workflow and came up with this version of my M16 nebula...
Imaging telescope or lens: Saxon Velocity 2001, Klaus Helmerich CF tube
Imaging camera: ZWO Optical ZWO ASI 1600MM cool
Mount: TAKAHASHI NJP Temma 2
Guiding telescope or lens: Saxon Velocity 2001, Klaus Helmerich CF tube
Guiding camera: QHYCCD QHY5L-II
Software: Luc Coiffier's DeekSkyStacker, Adobe Lightroom Light room CC, APT - Astro Photography Tool APT3.13
Filter: ZWO Narrowband
Accessories: ZWO Optical Off Axis Guider, ZWO Optical Zwo Filter Wheel 7 x 36mm, QHYCCD Polemaster
Resolution: 2747x2576
Dates: July 15, 2017
Frames:
ZWO H-alpha: 30x120" (gain: 138.00) -15C bin 1x1
ZWO S-II 7nm: 30x120" (gain: 138.00) -15C bin 1x1
zwo Oiii: 30x120" (gain: 138.00) -15C bin 1x1
Integration: 3.0 hours
Avg. Moon age: 20.30 days
Avg. Moon phase: 69.14%
Astrometry.net job: 1700917
RA center: 274.699 degrees
DEC center: -13.840 degrees
Pixel scale: 0.779 arcsec/pixel
Orientation: 23.604 degrees
Field radius: 0.408 degrees