Quote:
Originally Posted by [1ponders]
Do you mean that each image is slightly offset from the next one? If so I think I worked out what was causing that with my setup.
It was a combination of not be accurately enough polar aligned and choosing a guidestar away from the object being imaged. I've noticed lately that when I setup for the night and I don't check polar alignment with a quick drift and rely on the circles drawn on the concrete than I am almost guaranteed to get shifting between individual images. The offset guidestar just seemed to make the image jump larger.
However that didn't produce those long stars in the corners, that was simply field curvature and the WO FR dealt with that beautifully.
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Yes, I can see that poor PA and an offset guide star will cause this effect. I'll check everything out more carefully next time.
Geoff