View Single Post
  #9  
Old 24-01-2014, 11:35 AM
Terry B's Avatar
Terry B
Country living & viewing

Terry B is offline
 
Join Date: Mar 2006
Location: Armidale
Posts: 2,790
You shouldn't need terribly long exposures to get a good S/N. Without guiding the star may not have spent long enough on the slit.
What software are you using to calibrate?
Reply With Quote