10X50 Binoculars photo adapter to iPhone 6 camera

I wanted an adapter for my iPhone 6 to take astronomy photos, as I don't have an expensive camera and a long lens. Decided to rope my WW2 Binoculars in for the job. 10x50 ausJENA (Carl Zeis)

Found the idea from Steve5092 for this adapter.
https://www.thingiverse.com/thing:2009859


Did the following changes to his design:
1) The adapter created vignetting due to the camera lens too far from the iris of the binocular lens. I changed the focal distance that it is touching the eyepiece