Despite some images on internet show this nebula as red, my photo in 2011 using Color DSLR and this photo show the nebula as green.
Newtonian Reflector Telescope 305 mm F/5 - CMOS Mono Camera - LRGB Filters - Coma Corrector
RGB - 60 x 1 min
gain 174
And for green channel I processed with lowest scale value on Fits Liberator.
red - Arcsinh - scale 400
green - Arcsinh - scale 50
blue - Arcsinh(Acrcsinh(x)) - scale 100
DSLR image - 2011 -
http://jsmastronomy.30143.n7.nabble....17-k9-crop.jpg
http://jsmastronomy.30143.n7.nabble....ide_091218.jpg
http://jsmastronomy.30143.n7.nabble....ail_091218.jpg
What visual color you get with this target ?