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I agreeImaging telescope or lens:EdgeHD 8
Imaging camera:Atik 460EX Mono
Mount:Astro-Physics Mach1GTO
Guiding telescope or lens:EdgeHD 8
Guiding camera:Lodestar X2
Focal reducer:Celestron EdgeHD 0.7x
Software:PixInsight 1.8, Craig Stark Nebulosity 3
Filters:Astrodon 5nm SII, Astrodon 5nm H-alpha, Astrodon 5nm Olll
Accessory:QHYCCD OFF AXIS GUIDER
Resolution: 1280x1096
Dates:July 6, 2017, July 12, 2017, July 13, 2017, July 14, 2017
Frames:
Astrodon 5nm H-alpha: 15x600" bin 1x1
Astrodon 5nm Olll: 15x600" bin 1x1
Astrodon 5nm SII: 15x600" bin 1x1
Integration: 7.5 hours
Avg. Moon age: 17.21 days
Avg. Moon phase: 84.88%
Bortle Dark-Sky Scale: 6.00
Astrometry.net job: 1682928
RA center: 299.907 degrees
DEC center: 22.723 degrees
Pixel scale: 0.731 arcsec/pixel
Orientation: -14.182 degrees
Field radius: 0.171 degrees
Locations: Home, Seattle, WA, United States
Data source: Backyard
Subject: M27: A planetary nebula in the constellation Vulpecula, located about 1360 light-years from earth.
Capture notes: A straightforward narrowband capture. S-ii was captured over two different nights due to some clouds coming in the first night, but otherwise all lights were taken during a long run of extremely clear summer nights in Seattle (making up for last winter I suppose).
Processing notes: I used tone maps to stretch the individual narrowband channels, combined them into an RGB image and then applied a synthetic luminance made by integrating the original narrowband channels. My main concern with this image is whether I went overboard with deconvolution ... most of the detail can be attributed to applying local histogram equalization to the luminance.
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