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I don't remember the precise figures, but one evening I got my HEQ5
down to a PA of just a few arc seconds, and managed a sub of 105 seconds with no sign of star elongation. Being as I can go no longer than about 80-90 secs due to LP, I haven't bothered with guiding, just doing more subs. 8" f/5 scope.
It is now 5 weeks since the weather allowed me to get the scope out, and not much hope for at least the next week or two, so it's pretty much
academic at the moment.
raymo
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