Quote:
Originally Posted by allan gould
Greg
Thanks for your detailed reply. Ive taken it all on board. The 0.2 sec shot was for my flat with the light box. It gave me an adu of ~2000 and 2 sec gave about 20,000. So I have to experiment to get the sweet spot for DSS. Bias taken at 0.001 sec for the QHY8.
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Not sure how the shutter is on the QHY but with Apogee and FLI cameras they use a 3rd party shutter which opens and closes like a normal camera lens. If you took a .2 sceond flat with one of those cameras you can clearly see the shutter leaves in it.
Go for ADU of 20-25,000. 2000 is too dim and may not show up the dust donuts very well. The camera handles ADU up to 65577 so go for 1/3rd = approx 22,000.
Greg