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I had a Skywatcher 14" goto dob. Tracking was OK for goto and general visual use. For planetary when using a barlow and a small chip (ASI290MM) then the planet would still drift across the frame even when tracking. And every 30 seconds or so you would have to re-center the planet.
I also tried some deep sky with a DSLR and could only manage 20s exposures or you would get tracking errors showing in the photos.
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