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OK so maybe I did not articulate my question very well.
I know why a polar alignment or drift alignment is and why it is used and I know what a 3 star alignment (or similar) is and why it is used.
I understand that for imaging good polar alignment is required and that a lot of people use drift alignment to gain a more accurate polar alignment. What I am unsure of is whether a 3 star alignment is necessary for imaging and if so at what stage of the setup process would it be performed.
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