I got a response from somewhere, that you can put the ZWO’s rings attached to the (2”) SC accessory adapter that fits into the electronic microfocuser that I use on my Meade LX200GPS. The microfocuser is a Meade #1209 Zero Image-Shift Microfocuser. Most YouTube videos and other pictures I have seen show attaching the back focus rings to the rear cell of the SCT. I prefer using my electronic microfocuser over the manual focus knob. I ask if this is correct because I was trying to use NINA without using a focal reducer/flattener and I got an error message regarding scale, focal length changes and degree changes. If I attached to the SCT rear cell, without using the microfocuser, would the NINA error message still appear if the back focus was at 55mm like it is supposed to be? When I used NINA with my DSLR and 250mm camera lens, which I did enter in the camera lens specs, I did not get any error messages from NINA at all. No error messages regarding slewing, plate solving or image size issues. But the ZWO and my SCT I am having issues in NINA.
