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I have recently built up my reduction library...
My directory structure is as follows..
Darks
-> -10c
-> -15c
-> -20c
|-> 300sec
-> 240sec
-> 180sec
-> 120sec
Etc etc... I have 15x 1, 5, 10, 30, 60, 120, 180, 240, 300, 360, 420, 480, 540 and 600 sec at 5° increments from -5°c through to -35°c.. I have the same directory structure for bias frames, however I only have 5 bias frames at each temperature, and obviously, the exposure duration is always the minimum exposure duration of the camera..
Flats, I dont do a flat library, because dust and imperfections in the optical system can change frequently... as frequently as every use some times... so I find its always better to take fresh flats either at dusk before imaging, or dawn after imaging....
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