Quote:
Originally Posted by Shiraz
I think that if you have a PA error, the image will rotate about the guidestar - both axes are involved. In OAG systems it will look like the image is rotating about a point outside of the field of view, but with ONAG or a guidescope, the center of rotation can be in the fofv.
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Ah ok fair enough, thanks mate. Admittedly I've always been a bit less concerned with PA than some people, partly because the adjustments on my old EQ6 were so difficult to make that once I got it within a couple of arc minutes I didn't think I'd be able to adjust it any better than by pure luck.
Total PA error is probably 3-4' at the moment. Alt is a bit awkward to adjust on the Linear, but Az is easier so maybe I can tweak it a bit more in the near future.