Posted By Charles Stevenson
I have a Celestron 80mm Guidescope #52309 mounted on my C8. I've read that for astrophotography it's best if the camera is screwed onto the scope rather than connected via tubes with retaining screws (don't know the nomenclature offhand). I removed what I think is called the visual back from the focuser to remove it from the equation. The focuser silver tube has threads on it. They're not SCT thread as my corrector reducer doesn't fit (the diameter is smaller... maybe it was 1 3/4"? I'm at work and didn't bring in the measurements). Does anyone know what the threading is? Has anyone used this scope with a guide camera and or taken photos through it?