Agreed, getting the manual bino focus in the right spot and then getting the phone’s autofocus to play nicely with it is a difficult task. In addition, my bino shots introduce a lot of chromatic aberration. I’m thinking of maybe 3D printing a bracket that can help keep my phone attached to the binos, so that I can get a steadier shot with both hands.

Here’s a recent photo I snapped of an oriental cuckoo using binos and a phone cam:

It was at quite a distance so this is 10x bino zoom + cropping.