Greetings all, I'm new(ish) to the hobby at least with the new post retirement hardware. The setup includes a WO FLT120 and was sold to me with a flatener/reducer which needs an adapter to fit the focuser. In the optical line I now have the reducer, EFW (with adapter ring to fit the reducer) and the camera. Focuser gets focus at only ~19mm withdrawn, presumably because of all the other stuff in the optical line. However all of the images I get have quite significant vignetting in them and I'm wondering if the flatener/reducer is the right on for the scope or if there is a better alternative out there I should be using.
Pictures included to aid understanding of the setup, all advice from more experienced users welcome.
Thanks