Quote:
Originally Posted by LewisM
I don't know which programme(s) you use for image processing, especially integration, but I have found a Median integration to nearly always mitigate or even remove entirely any FPN. Average integration on the other hand, seems to show it (especially on bloody SBIG cameras).
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G'day Lewis. I'm using a SX CCD in Maxim to image, DeepSky Stacker to stack and PS5 to process (while I try to get my head around PI).
I'm approaching the solution a step at a time. Tonight's first baby step was to redo the PA. SharpCap told me I managed an "excellent" alignment. I haven't bothered to do a SYnScan 3-star alignment and Polar align (the new version of SynScan offers a good routine for this).
If this artifact persists, I will drop my guiding subs from 5 to 2 seconds. But I'm imaging from a suburban location within a km of the sea so seeing quality is pretty bleah making it difficult to find a guide star most of the time unless you run to longer subs.
If neither of those things produces a result I'll try to find how to dither in Maxim. I can't see it on a quick skim but it's sure to be there somewhere. If not I'll switch guiding to PHD2 but that means running yet another software package and straining the old CPU a heap more than I like.
Anyway, that's the plan. It'll be interesting to whether there are incremental improvements or none at all. I'll try to come back to this thread with a report. Might be a little while though. I'm headed to get some bits of me cut off this Friday as a result of which I may not be imaging for a couple of weeks.
Peter