A combination of narrowband and true colour imaging to map out the dominant Ha, OIII and SII regions in the object.
Ha and SII where mapped to red and OIII to cyan.
The pinkish regions indicate strong SII emissions relative to Ha.
The redder the region the stronger the Ha emission.
Cyan /blue regions indicate a strong OIII emissions.
3hrs each Ha, OIII, SIII combined luminance, 1 hr each RGB.
BRC-250, STXL-11002 camera.
http://members.iinet.net.au/~sjastro..._OIII_SIIc.jpg
Clear skies
Steven