开云体育

Hi Bob,
I forgot to add that you have to secure the way the secondary holder is fixed in the secondary spider. If this is not tighten enough you will have some flexure with altitude and the secondary will move more significantly than this is tighten firmly. You can imagine that this is true for spider in UTA and also truss tube in UTA. If you have some lag somewhere it will result in flexure with altitude and you collimation will show this flexure as the secondary moves.
Once again, this is just some exercises you can experiment in day light to fully enjoy this scope at night.
贵谤é诲é谤颈肠