To do decent planetary, yes, you really need to stack multiple images from video. From memory, I had the P200 at max zoom on a digicam adaptor - as close as I could get to the eyepiece (can't remember if it was 40x or 100x eyepiece sorry...)
Shoot a few videos of 30sec to a min.
Get a freeware program called Virtualdub - Use that to convert Mpeg video clips from camera to AVI.
Then get the freeware program Registax and load up your avi.
You'll need to do a bit of reading up on registax and how to get it to pick and align frames - its not terribly intuitive IMHO - but fantastic in what it can do.
The image I showed was stacked, then sharpened using the wavelet function.
That should be enough to keep you busy for a while!
Rob
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