Quote:
Originally Posted by Benjamin
Some great little details coming through  I’ve never gone past 5 minutes with my ASI1600MM-Pro doing narrowband mostly due to the table found early in the following link to a cloudy nights post - https://www.cloudynights.com/topic/5...-maybe-qhy163/
I’m almost always shooting from a red zone backyard and at f4 so sub duration for me should be pretty short I think. The good thing is that shorter subs with this camera really work. Can make life easier if there are clouds or guiding isn’t great. Not sure it matters heaps but at 20 minutes you might find you are sky limited if not at a dark sky site? |
I use that table too Ben and although I'm not at a dark site, i do have pretty dark skies......light polution map shows me as Bortle 3 (rural) with an SQM of 21.88.
I try to work my exposure times out with the "expected value above bias" part of the table. I must admit though the 20 minute subs are taxing on the mount and so I am planning on running a high gain/short sub test on my next clear night.