Quote:
Originally Posted by DiscoDuck
Thanks Glen. I was going by Ray's target ADU above bias from those tables. On the moonless night, even at 10 mins with gain at 202, I was only getting about 500-600 ADU above bias - i.e. less than the target of 650. So not quite shot noise limited. Seems surprisingly longer given Ray's estimates of the expected times, but I guess there's things like the large central obstruction in the RC scope which will add a bit of extra time.
On the second night, I was about 1100 over bias, and so should probably have wound back to 5 mins. But I was wary of mixing subs of different lengths in the final stack. That said, the mixing didn't work out well as it was!  |
Oh the RC explains it i guess. I am used to doing everything at f5. I can't offer advice on the pattern, never seen it before.