View Single Post
Old 26-03-2013, 09:03 AM
SpaceNoob (Chris)
Atlas Observatory

SpaceNoob is offline
Join Date: May 2012
Location: Canberra
Posts: 268
Originally Posted by Shiraz View Post
thanks for the link Chris. Do you use the calculator for narrowband and if so, what sub exposure lengths does it suggest?

Suggested exposure lengths have been 20.7 minutes for Ha 5nm with the FSQ at f/5. While this has been fine for most of my targets, there would likely be issues with brighter targets, given limited well depth. Calculators can be used as a suggested guide for sub length; while respecting the rate of saturation for brighter objects. Like everything in this hobby, its about finding a balance.... only to find that there is some other variable you need to account for. You're dealing with different issues for narrowband.
Reply With Quote