Quote:
Originally Posted by leon
It is always best to do the dark's at the same evening as your lights, with as close as possible temp range.
However some do have a library of dark's, but i think most don't keep them forever, so to speak.
Leon
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Thanks for that Leon
I'll start ditching some of the oldest ones. I always take darks as soon as I have finished imaging
Quote:
Originally Posted by rogerg
Sounds like you're dealing with a DSLR so I agree with Leon that you would be best using dark frames from close to the time the light frames were taken, due to temperature variation of the camera. As such your possibility library size of useful frames is quite limited.
If you were working with a temperature regulated camera then you can more effectively build up an extensive library of dark frames to use over many months or years. Even then I find the darks change slightly over time and so I prefer to take new ones each year or so and stop at a reasonable number like 30 dark frames for a given set of camera settings.
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Yes I'm using an uncooled DSLR Rodger. Thanks for the clarification.
I probably got the idea for a dark frame library from someone who has a cooled CCD camera and thought it would be a good idea for a DSLR. I'll just use the ones from the same night from now on, or until I take the next step and upgrade the camera to a CCD