First go at the Helix in narrowband. I had high hopes for this as I find it such a beautiful object but it's so faint, especially in SII, that I'll have to wait until I'm under dark skies to do it justice.
I preferred this look over a traditional HST palette, I'm calling it "Green eggs and ham"
Ha - Red channel
10x5min + 7x10min
SII - Green channel
1x5min + 7x10min + 3x15min + 17x20min
OIII - Blue channel
10x5min + 8x10min
Taken from Rushcutters Bay in Sydney with my Atik 314L+, SW 120/f5, EQ6
Slightly better version here:
http://hughsblog.wordpress.com/2013/...-at-the-helix/