What program are you using to process your light frames Kirkus? The theory is the similar/same for most programs but how you implement it may be slightly different. Eg. DeepSkyStacker you just open all your lights, darks and flats and let the program go to work, ImagesPlus can be automated similarly or you can approach it in a step by step manner.
In the end though the outcome is the same. The darks are combined using an average, median or (rarely) mode combine to produce the Master which is then subtracted from your light frames.
|