OAG - how do you rotate?

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OAG - how do you rotate?

Postby bvalente » Tue Nov 07, 2017 6:15 pm

How do people rotate the ZWO OAG or do something else in order to find guide stars?

It appears that the ZWO OAG does not allow for rotating of the prism around the circumference of the image circle, unless i'm missing something.


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Re: OAG - how do you rotate?

Postby Sam » Wed Nov 15, 2017 1:08 pm

there is a very small angle to rotate
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Re: OAG - how do you rotate?

Postby bvalente » Wed Nov 15, 2017 3:21 pm

how do you rotate within that small angle? i don't see any instructions or details on that

thanks

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Re: OAG - how do you rotate?

Postby Ebenezer » Thu Dec 28, 2017 1:36 am

If rotation of the prism is limited, then finding a guide star is a challenge for really long focal telescopes.yet this is the very reason OAG is preferred to reduce flexture.
Hope am right in my comments.
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