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Hi Rowland
Are you able to post a dark frame? Surprising that its contributing to noise.
Is read noise a function of exposure time? I thought it was per read event, that is noise generated whilst reading out values, hence longer subs to reduce read events. I could be wrong.
I know you arrived at the -5c value based on a lit of trial and calculation but looking at graphs showing noise vs temp, -5c and -15c have a marked difference in noise. Ive seen this with my sbig stf8300m. -5c is borderline unusable but -15c is.
Have you tested pushing the cooling to -15 and comparing 5 min darks? Will be worth testing.
And finally, startools does a very good job of controlling and reducing noise when turning tracking off. This produces a smooth image as well. Have a go with the beta release, Ivo mentioned it handles develop and noise better.
Cheers
Alistair
Last edited by alistairsam; 12-03-2014 at 09:03 AM.
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