Hi Guys
Excellent weather conditions for the last week in Sydney allowed quite a bit of imaging time, and with the moon down, thought id try LRGB again.
Was a bit of a shock, its been a while since ive tried LRGB, processing is so hard with heavy light pollution, narrowband is much easier, processing wise anyway
.
I never do flats for NB, just dont need em, but did for this image, and discovered a nasty little problem I havent even heard of before. AO dances the image around so that flats dont fit that well (taken with AO off), your left with halos around where filter dust donuts are on the flats. They seemed to dissappear (or get hidden) somewhat during processing, but never the less a disturbing discovery.
Anyhoo... M83 for your pleasure at my site home page
here, with gaud awefull stars and next to no colour in them, I hate those bugggers, just gave up (well, M83 would look pretty daft without them I guess
). Humies recent M83 got the star colour smick, perhaps I could nick them.........
.
Im happy with outer extension, but the noise was a bit severe.
LRGB :Lum 5hrs, 30 off 10 min subs bin 1 , RGB 50mins each, 10 off 5 min subs bin2
AO was cranking at about 3 hz. Interestingly, it was working hard when I started at about 10pm, and settled right down as the night wore on, and it got nearer the zenith. The AO operation gives a good indication of seeing.