|
Good guiding and elongated stars seems to be contradictory statements.
The only time I have seen "good guiding" (of course its not good guiding if the result is elongated stars) was when I had differential flexure and I was using a guide scope. So the guide scope was seeing the guide star just jim dandy but the imaging chip was showing drift due to something not being rigid with the guide scope.
If in fact your guiding is good then that only leaves optical movement like the secondary is moving slightly or the primary is distorting slightly.
When you grab these parts are they all rigid? Mirrors, tube, focuser?
See if any move when you push/pull them.
Greg.
|