Posted by David Arditti at 17:51 on 2011 Mar 21
Nick’s problem will only apply if you regularly GOTO on opposite sides of the mount. If you stick mostly to one side, as I do, adjusting the clock or time displacement so you don’t swap sides, there will be no effect from non-orthogonality of the mount. If you do swap, there will be an effect on pointing accuracy (though many telescopes have major pointing effects from shifting optics/collimation as well). So far as I can see, there will never be an effect on tracking accuracy (what I presume Nick means by "guiding"), provided the mount is correctly polar aligned.David