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Here is the situation. I am using a DSLR and have several Master Dark files saved at various exposures (ISO 3200 30s, 60s, 90s, 120s, 180s, etc). When I shoot a session I will typically have 2 sets of lights the next morning, say 90s and 120s. I then take my flat frames.
When I pull in the files to make my Master Flat I use my Master Bias and BPM. Do I need to make 2 master flat files - one with the 90s Master Dark and one with the 120s Master Dark, or do I create I master flat? (And if 1 master flat, which master dark is the best to use)?
-Ryan
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