View Single Post
  #3  
Old 22-11-2012, 07:17 AM
Geoff45's Avatar
Geoff45 (Geoff)
PI rules

Geoff45 is offline
 
Join Date: Jul 2006
Location: Sydney
Posts: 2,631
Do a google on "ccd exposure calculator" and it should give quite a few hits. Have a look at this one
http://starizona.com/acb/ccd/calc_ideal.aspx
The basic idea id that you take an exposure, measure the adu of the background and enter exposure time and background levels and the calculator spews out an ideal subframe exposure time.
Geoff
Reply With Quote