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Narrowband Ha/OIII Helix
Here's my take on the Helix. Done as a narrowband Ha/OIII Bicolour with synthetic green channel as LRGB. Moon was very close during the captures (left hand side during Ha, right hand side for OIII the next night) and required shading the guidescope to pick up any stars.
PS. excuse the eggs
Standard information:
* Scope: North Group 127ED
* Imaging device: SBIG ST-8300 at -25C
* Mount: HEQ5pro using Eqmod
* Guiding: QHY-5 through finderguider using PHD
* Exposure details: 3 hours of 30 min subs for both Ha and OIII using Baader filters
* Stacking method: DSS Median, stacking with Darks and bias frames
* Summary of post processing: Aligned in Nebulosity combined and post processed in PS (curves, levels, synthetic green channel using Carboni's astro actions, combined Ha and OIII used for luminance channel.
* Darkness of imaging site: (Fugly!) 80% moon on either side
* Dates image taken: 17th October for Ha, 18th October for OIII
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