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Connecting ZWO ASI1600GT to SCT 9.25"

Astrophotography CCD Celestron Equipment Imaging
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#1 verityfalls

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Posted 21 September 2021 - 01:59 PM

Hello everyone! I am a science teacher working on getting a CCD setup up and running for an Astronomy class I am teaching. I have a lot of experience in CCD imaging, but only with stationary scopes; this is my first foray into mobile mounts and setups. I have an AVX with a 9.25' SCT, and I am trying to attach my ZWO ASI1600GT.

 

The current solution I found (several stacked adapters) is too long for the CCD's optimal focal length (which is 55mm). I'm considering this piece (https://www.celestro...pes#description) which has the proper thread sizes for both sides but seems long. 

 

Anyone have insight on attaching the CCD to the scope?



#2 Woody218

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Posted 21 September 2021 - 02:38 PM

If you're not using the f/6.3 reducer, that Celestron adapter will work just fine, as there is no specific backfocus on the non-Edge telescopes.  If you are using the f/6.3 reducer, the backfocus from the end of the reducer to the camera's ccd chip is 105mm.


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#3 skaiser

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Posted 21 September 2021 - 04:48 PM

Yes.

if you are attaching directly to back of scope with camera , you don’t have to worry about back focus distance.

just attach camera and adjust for focus.

to help with fine tune focus, you might look at adding a handle to the focuser knob.

some of us have 3D printed a arm that fits over focus knob, and gives you a handle that extends out .it does help,

You might also consider astrophotography software like “astrophotography tool” ( APT) or sharpcap.

( both have free versions)

Fell free to ask any other questions.

take care




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