Thanks Alex, Dietz, Peter and Gary for your comments.
I use a DFK modified camera with 2x barlow and small extention tube, with 14" LX200 that has been flocked and cooled to ambient.
I was out imaging Jupiter this morning and now I think I know why Io is streaked in the last image. I had FPS set on 30 and yet it was only recording at 15fps. It wasn't until I moved the shutter slider from left to right that the camera began recording at 30fps. So this last image may have been recorded at 15fps, and as I limit my runs to 4050 frames; the avi could have been just over 4 minutes instead of just over 2 minutes.
Little bit wiser now.
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