About 9 hours of narrowband data on Thor's Helmet with an RC8 + EQ6 and an ASI1600 MM-C (selected from about 11 hours if data with a cutoff on FWHM). An attempt at a bicolour image attached.
Higher res available on Astrobin
here.
Comments welcome. Always struggle trying to find the best field of view for this one and balancing the colours (in this case fake colours!).
Thanks for looking.
Paul