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

the issue is with when the maps api supports the use of CANVAS with the specific browser

Maps API version 3.7 January 24, 2012 included Enabled Canvas Street View on IE 9, Opera and Safari/Windows

using maps api 3.6 that doesn't support canvas in maps ( except chrome browser ) you get the FOV as 0: 180, 1: 90, 2: 45, 3: 22.5, 4: 11:25

any streetview loaded within a maps supported canvas get FOV as 0: 127, 1: 90, 2: 53, 3: 28, 4: 14