Simple steps from 80 horizontal field of view up to 120 field of view
Game might start you with a weird field of view. this should help you get it to where you want it.
89 vertical fov for 120 horizontal fov
78 vertical fov for 110 horizontal fov
68 vertical fov for 100 horizontal fov
And for the most used fov it will be 59 vertical fov for that sweet 90 horizontal fov
If you wanna stick lower you can use 50 vertical fov to get 80 horizontal fov
You can find your Field of View slider at the options/display/video