Quote:
Originally Posted by Andrew C
The background to my question is that I use the scope primarily for long exposure video astro, and smearing or star trails sometimes start to become evident for exposures over say a minute.
In the absence of a polar scope on my CG5 mount I use the camera view to polar align. I can get the true SCP centred to a high degree of accuracy (a few arcminutes) but of course with this method the effect of any misalignment between the RA and optical axes remains.
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This sounds more like a polar alignment issue? Out of curiosity, how do you know that your polar alignment is within a few arc mins?
As bojan mentioned, drift alignment is a good way of getting very accurately aligned. If you have a computer connected to the mount, you can use software such as AlignMaster to do it more quickly.