G'day all,
Have been doing some testing with my new asi1600 and esprit 80ed to see how long exposures turn out.
Hi res version:
http://www.astrobin.com/263180/0/
This is a total of 39 x narrowband subs @ 900sec. I'm impressed with the results and how noise free the image was (I actually had to add some comfort noise to the background).
I think with this camera more shorter exposures may be the way to go, as I also did a couple of 300sec subs and couldn't see too much drop in signal.
Cheers guys.