My final Narrowband Hybrid of M27. RGB was replaced using channel swap (except for a small percentage of green channel) with OIII as Blue, OIII as Green and H-Alpha as Red. No SII used in this version. Then I used H-Alpha and OIII as luminance. Finally I used the stars from the RGB image for natural star color.
Total Exposure 13.7 hours
Location: DownUnder Observatory, Fremont MI
Date of Shoot 18th, 21st, 22nd and 23rd June 2012
Exposure: RGB 6x10 mins ea, H-Alpha 9x40 mins, OIII 10x40 mins unbinned
Camera: QHY9M monochrome CCD, cooled to -30C
StarlightXpress Color Filter Wheel
Scope: Astronomy Technologies Astro-Tech 10" f/8 Ritchey-Chrétien astrograph
Astro Tech 2" Field Flattener.
Autoguided using QHY5 autoguider, StarlightXpress Ultra Slim Off Axis guider
Paramount GT-1100S German Equatorial Mount (with MKS 4000)
Image Aquisition software Maxim DL5
Stacking software CCDStack
Post Processed with Photoshop CS5