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Adding an OAG to Imaging Train w Feathertouch Focuser (SCT)

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#1 techmgr

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Posted 19 January 2020 - 01:10 AM

I have a Celestron C-11 to which I've added a Feathertouch Crayford focuser.  Up to now I've use a separate guidescope setup for guiding, but I would like to switch to using an OAG (looking at the Celestron OAG).  I'm having a hard time trying to determine whether I will be able to put this into the imaging train between the focuser and the camera setup or not.  I'm sure this sounds like a stupid question, but is it possible? Does the OAG come with an adapter to add it to the focuser? 

 

Thanks in advance for any help you can provide.



#2 futuneral

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Posted 19 January 2020 - 01:52 AM

That's actually how it's supposed to be used. Any specific issues you're seeing with this?

Check this out:

 

https://www.cloudyni...hy-setup-guide/


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#3 DuncanM

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Posted 19 January 2020 - 02:09 AM

I have a Celestron C-11 to which I've added a Feathertouch Crayford focuser.  Up to now I've use a separate guidescope setup for guiding, but I would like to switch to using an OAG (looking at the Celestron OAG).  I'm having a hard time trying to determine whether I will be able to put this into the imaging train between the focuser and the camera setup or not.  I'm sure this sounds like a stupid question, but is it possible? Does the OAG come with an adapter to add it to the focuser? 

 

Thanks in advance for any help you can provide.

Most OAG's will come with a 2in barrel adapter:

 

Crayford->2in barrel adapter-OAG->spacers->Tring->camera

 

or some variation of the above.

 

If you are going to use a focal reducer, I'd suggest looking at the Starizona .63x SCT FR,  which should work well with a C-11 'classic' as it has a 2in barrel.

 

In which case the setup would be:

 

Crayford->SCT FR->t adapter->OAG->spacer->Tring-camera. If you tell Starizona which focuser and OAG you have, they will make sure you get the right spacers.


Edited by DuncanM, 19 January 2020 - 04:16 AM.



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