Quote:
Originally Posted by Bassnut
...... but there is nothing about its operation that is subjective, it pushes the OTA around and produces round stars or it doesnt.
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Fred! That's brilliant! I may have to quote you in future
So in summary, if you have an optical system of focal length x, and the mount (be it a garden rock, or PME) gives you nice round stars, you've got it scummed.

Be happy!