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Hi Stephan
Imagining near the celestial pole is infact easier ( less demanding ) on your equipment. As your RA rotates the OTA has less apparent motion across the sky if that makes sense. An example is if you hold your arm out to the side and rotate across your body, the tips of your fingers have to move quite fast relative to your shoulder. If you now point out in front of you and rotate in an arc you hand moves much slower to cover the same angle of motion in the same amount of time. In this case when your OTA is pointing close to the pole there is significantly less inertia in the RA rotation making it much easier for your mount to correct for errors. Typically my guiding numbers are about 30% better close to the pole than close to the celestial equator. Hope this helps
Ryan
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