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Stars with squiggly trails
Been trying out astrophotography with my LX90 8" scope on the LX90 alt-az mount. I have been able to take photos up to 1 mins exposure with no noticeable star trails for objects with altitude angle around 50 deg or less. However I'm having problems taking high altitude angle objects, around 70 deg or more, the stars have squiggly lines, seems like the scope is struggling to track the object and bouncing around.
I have tried to reset -> calibrate -> train drive a few times, but that didnt seem to improve.
Is this a limitation of alt-az mounts? or there is a problem with my motor drive? Do I need to get a equatorial wedge?
Victor.
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