how can I determine the Field of View a street view panorama map is using

Question

I notice the Field of View (FOV) degree per street view zoom level is different between browsers

I believe the documented street view zoom level to FOV is

Answer 1

Currently, there is a table here relating zoom and FOV that says:

0=>180 1=>90 2=>45 3=>22.5 4=>11.5

You can convert from zoom to FOV in javascript like this:

var fov = 180 / Math.pow(2,zoom);