cl_fov command

cl_fov number
Command effect
This sets the field of view (FOV) to the specified number. The default value is 60. Standard values are 60, 65, 70 and 75.
Default parameter
cl_fov 75

How to enter a cheat code

Cheat codes are entered in the console. Open the console by pressing the § / ~ / ` key, which is usually located in the upper-left corner of the keyboard. Enter the cheat code and press the Enter key.

This cheat is only available after you add -devmode to the "SET LAUNCH OPTIONS..." section in the Steam properties of the game.