I have used this technique to create a synthetic luminance. Why not use 100% of the Ha vice a percentage of the image, would you not get a better result?
http://forum.startools.org/viewtopic.php?f=7&t=236
Synthetic Luminance
Synthetic Luminance
Scott
CEM60, ES 102ED with Motorized MoonLite Focuser, Mallincam VRC-8 Ritchey-Chrétien with CCDT67, Atik 383L+ Mono with EFW2 FW, Baader 36 mm NB and LRGB Filters, RV-6 Dynascope, a very understanding and loving wife, and a Roll Off Roof Observatory
CEM60, ES 102ED with Motorized MoonLite Focuser, Mallincam VRC-8 Ritchey-Chrétien with CCDT67, Atik 383L+ Mono with EFW2 FW, Baader 36 mm NB and LRGB Filters, RV-6 Dynascope, a very understanding and loving wife, and a Roll Off Roof Observatory
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midwayexpress
- Posts: 69
- Joined: Sat Jan 12, 2013 9:42 pm
Re: Synthetic Luminance
You end up loosing traces of blue reflection nebula and areas where ha isn't very intense from the image. Synthetic Luminance gives you a balance of both.
Re: Synthetic Luminance
This forum needs a voting system (I spend too much time on Reddit I think) - I instinctively wanted to 'upvote' midwayexpress' answer! 
Ivo Jager
StarTools creator and astronomy enthusiast
StarTools creator and astronomy enthusiast