I am noticing that stars tend to be elongated towards the upper left corner of the image when the camera is connected to a field flattener attached to my ED80T refractor.
I use a solidly mounted Moonlite micro focuser and my cables are well managed. Below is a link to 100 minute integration of data.
https://1drv.ms/u/s!Ah4OVuGaaPaogdk5m9j ... A?e=BRVcEk
Any ideas why this might be happening and how should I troubleshoot?
https://astronomy-imaging-camera.com/tu ... ve-it.html