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I have the EQ5 mount (motorized on both axis) & yep, it certainly depends on how well your polar alignment is. High magnification planetary photography is not that easy with a rough polar alignment. Every 30 secs or so I have to make an adjustment to the DEC to keep the image central using the hand controller. It can be done by using the DEC slo-mo hand control but I would be taking the knob off & putting on a flexible cable on it.
For pure visual use having just the driven RA axis is fine. Comes back to how good your polar alignment is then.
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