Thanks guys - this is all v useful. I like PHD because its so simple, but the Help files are a bit on the short side for humble newbies like me.
I see now that the 0.2 sec default which I had changed to 1 sec is in fact the camera exposure only and has no relationship to the period of time between guideframes. So I'll set this at 2 or 3 sec and see what happens.
I'll also give the PHDanalyze a go.
Once again, this highlights how important it is to getthe polar alignment right.
I'll report back when I get outside next - hopefully later tonight
Pete
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