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Thanks Ray, always great to see this sort of analysis from you. One question, in your previous sets of ASI1600 charts, as in the Optimum Broadband Sub Length chart (which included max electron count after stack at various Gain settings), your sub time recommendations were slightly different. Not sure I understand why they changed, and I am ignorant of the calculations required. In my experience the original chart times, were pretty good and usually I was able to adjust (for local conditions) to the recommended sub background sky ADU, which I think was 400 at the time. Can I still go by sub background sky ADU? It seemed a simple test that even I could manage.
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