Yep I have the Hubble and have used it several times to check/tweak collimation when the physical conditions are right, that is I have a good distance available to place it in a visible location. But this is the concern - I'd rather collimate at a good elevation and it's difficult to get the Hubble a hundred or so metres away at elevation! I don't have a tall enough tripod
Quote:
Originally Posted by billdan
The only thing wrong with this artificial star concept is, with Newtonians you shouldn't collimate when the scope is horizontal. Because collimation could shift when pointing vertical.
Its better to collimate at about 60 - 70 degrees elevation. You then minimise any collimation shift during an imaging session.
I suppose you could get a ladder and mount in a tree or somewhere high up with a remote on/off switch.
|