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If you use an EQ platform (not a motorised alt/az driver), then you don't get field rotation (if doing photography).
But yes, it still has to be reset every 40-50 minutes. That's not usually a concern for planetary/lunar photography unless you plan on making an animation or mosaic, in which case you'd need to rotate the webcam to match (after you've reset the platform), or rotate it in software in post.
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