I was under the impression rick that with read noise you can partially null the effect by the use of bias which is a map of your read noise.
Flats null the effect of light drop off and optical defects
Darks map your Thermal noise
combinations of these help you sort out and make the cleanest possible data for your effort.
Shot noise as your calling it am i right of the assumption that its what we normally call colour noise? and hence the reason for taking many long exposures to average this out and smooth the end image.
In any case ide rather lots of long exposures and now i have started seeing the effects of taking 10-15min RGB's, 15-20 min Lum and 15 min right upto 30 min for Narrowband unless its to do a masking image then ill never go back to short subs and lots of them as it just doesn't show details!
|