I have been gathering fifteen-minute subs of M16 for the past week, to add to the first lot I captured a week ago.
Here is a total of 5.75 hours
I tell ya, it is well worth the effort and a visible difference when you take the time to create darks and flats for subtraction, plus the extra subs. Really.
Baz.
(http://i42.tinypic.com/24fh9if.jpg)
Looking good, Baz, you have earned it!
Thanks Fay.
I think by stretching it so much to bring out the fainter outlying areas, I forgot to keep an eye on the histogram and the colours are off.
I ran them all through Deep Sky Stacker to see what that would do, and paid greater attention to colour balance.(http://i40.tinypic.com/15p60de.jpg)
(http://i40.tinypic.com/35i62i0.jpg)