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Hi Alex, Obviously the more stars you include, the slower the operation will be, so after ticking half a dozen frames, go into'Register Settings' and select
advanced tab at the top of the little window. You will see a slider. If for example it is set at 95%, and you need to reduce the number of stars, just slide it to the left down to say 75% and press the 'Compute number of detected stars' tab below the slider, and you will be shortly shown the number
of stars detected. About 50 is usually pretty good, so if the computed number
is still too high, just move the slider further left and compute again; repeat
the process until you're happy with the number.
Tick all your frames and register them. When all are registered, they will each have a score. Your good frames will all have similar scores, but some will have significantly lower scores.[ say 25% lower]. Go through the whole stack and untick the frames with poor scores, so they don't reduce the quality of your final image. And of course look out for meteors and satellites. Hope this helps.
raymo
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