Thread: 10 or 5?
View Single Post
  #11  
Old 26-07-2018, 12:54 PM
Peter Ward's Avatar
Peter Ward
Galaxy hitchhiking guide

Peter Ward is offline
 
Join Date: Dec 2007
Location: The Shire
Posts: 6,720
I have found longer subs to be better. I could show you an equation that supports this, but hey, it simply comes down to do everything you can to maximise signal (e.g more aperture, higher QE) , and everything you can to minimise noise (low noise camera, many subs, deep cooling, ultra clean optics). Is sky glow noise? Not really...just unwanted signal.

With my RC16 I typically grab 15 minute subs from my seriously bright skies...and if using NB filters 20-30 minutes.
Reply With Quote