Quote:
Originally Posted by ChrisV
I got these values on an 8" F5 newt with the ASI071 at unity gain (90) and offset of 20 running at -5C.
I've gone through a few images and the better ones (with darker backgrounds) have a background sky value of about 1300 for 6min subs. I think I worked it our properly - opened the fits file in fitswork and read off the minimum value on the histogram.
At this gain/offset - the offset/bias frame had a mean value of ~80 ADU (+/- 10).
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Chris, just my opinion, but six minute subs seem excessive for a OSC camera shooting in a city, even with a LP filter. Narrowband would be fine provided your not over-exposing. What sort of sky values are you seeing at 60 sec?