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Auto guide question

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#1 Teddythefinger

Teddythefinger

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Posted 17 August 2019 - 09:53 AM

I'm wanting to buy an auto guider setup but had a question first.
I'm going to put my scope where the finder scope would go, is this ok for auto guiding AND to use sharpcaps pole alignment? Or does the scope have to be on top of the telescope and not off to the side?
Thanks in advance!

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#2 bobzeq25

bobzeq25

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Posted 17 August 2019 - 10:09 AM

You're missing _the_ crucial point.

 

A guidescope needs to be very solidly mounted to the main scope.  Flexure between the two is easy to get, and devilishly hard to diagnose.  The PhD2 graph looks fine, your stars don't.

 

You can't tell how much flexure you've got, the strategy is to do the best you can to avoid it.  Here are examples of how to do it.  The key thing is to have multiple mounting points that serve as triangulation. Do not use a finder shoe.

 

https://www.cloudyni...ardrails/page-4


Edited by bobzeq25, 17 August 2019 - 02:03 PM.

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#3 Devonshire

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Posted 17 August 2019 - 11:35 AM

Sharpcap should not care about whether it's on top of or beside the scope for a PA, but to BobZ's point, the guidescope has to be mounted securely, so that it cannot sag, flop, shift, move...etc.. 

You need this both for guiding and Sharpcap's PA.  




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