I have had the Meade #777 OAG for a long time and I just got an SvBONY helical focuser from eBay. I was sure it would just thread onto the eyepiece/guide camera holder arm of the #777 after I unscrewed the extension part. But no -- apparently the threads on that part of the #777 is 35mm (or something) and the helical focuser threads are M36x1.
Does anyone know what thread size is for the #777 eyepiece/guide camera holder arm?
And could anyone machine or 3D print an adapter to go from the M36x1 to whatever the Meade #777 holder arm threads?
This is the SvBONY helical focuser:
Here is the eyepiece/guide camera holder arm of the Meade #777:
Thank you very much for any help you can offer.