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The closer you get to the pole the looser the tracking requirements get, as everything is moving slower, e.g. with a Canon 600d you could image for up to 2 seconds without any tracking at all at that declination,
You will still want a decent polar alignment, but the length of the star trails will be shorter than if it was lower,
Main thing pointing that high up is making sure your scope doesn't hit anything while imaging, as that tends to put the camera low on refractors,
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