Quote:
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The wobble is possibly due to small tracking errors in the mount
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this nags at me.
how to find out if it's just the camera shutter or the mount?
if it is the mount, the jiggle should happen multiple times in longer exposures - especially well visible in star trails. (he he he, it's good to be good in inaccurate alignment!)
if it is the shutter the jig will only happen once in any image.
I think I'll do the test again with that rubber band mount.
if it turns out that it is the mount/motor - how would I fix that if not by buying a new mount?
if it is the motor/mount then prime focal photos - even with a proper adapter and focuser - would certainly always show this error? or would the proper focuser and t-connection smoothen the jig - as I hope it would if the shutter were the culprit.
why go prime focal, at all, and invest money in a focuser and t-connection prior to having a proper mount?
yup. next clear night it's another prime focus test. I so hope it's only the shutter...