|
Alex, I usually use 5 min narrowband subs (at Unity Gain, 139) on fairly faint targets, with my ASI1600mm-c. So you can get 12 of those in your available hour, if trees etc permit. Depending on the narrowband luminance of your target that maybe too much, or may not be enough. Certainly for M42 Orion, you can run 60 -90 sec narrowband subs and still be swamped because of the signal strength. For fainter nebula more time, or Gain, will be needed. As Colin indicated Gain is a good thing. You can always come back over three nights to get three hours of signal too.
|