I finally got a chance to image with my F6.3 Focal Reducer directly attached to my 127mm Mak!
I like it - but I'd like to reduce the vignetting...
My optical train is:
127mm Mak (the "older" model with the 1" opening at the rear of the scope)
SCT Schmidt Thread Adapter
Celectron F6.3 Focal Reducer
Celestron 1.25" Visual Back
1.25" barrel adapter
Camera to t-thread adapter
Is my vignetting caused by:
the 1.25" visual back? (should I instead have a 2" path from the FR all the way to the camera?)
because my camera is 'too far back' and I need to move it closer?
Any thoughts on this?
ImageInfo: 12 90s frames, ISO 800, Bortle 6, Seeing: Poor