|
Thanks for providing the data Fred. Below is my one of the versions I’ve come up with. I started out as HOS, but the SII channel was rather dirty – perhaps needs more data collected. OIII is come up good after smoothing. The Ha is well captured, very little noise present and clean – good work. Fixed the blooming, this isn’t a big problem, but wasn’t very careful in doing so which affected some nebulosity. So based on this, I decided to do an RGB rendition using your data. Thought about using a synthetic green channel, but M20 does not emit much in the green wavelengths (more cyan). So the colour palette is Ha:OIII:OIII+Ha @ 25% opacity – mapped as RGB respectively.
This was then flattened and smoothed to create a standard RGB, that was later combined with the Ha for more depth – I couldn’t resist as the Ha channel is clean. I flatten this again to create a super RGB (that included the Ha as luminance), then added the Ha channel one more time to complete the LLRGB combination. The star colours went a little strange on me (began going teal). For NB this doesn’t matter so much, but as I was creating a pseudo RGB out of NB data, I wanted to keep it realistic. So I use the colour selection tool to rectify this (slightly increased yellow and magenta). I may try working with the SII frame and produce the HOS I originally intended to do.
|