fov command

FOV number
Command effect
This command sets the field of view (fov) to the specified number. It is recommended that you enter a number less than 150. Values above 150 can cause the game to become unstable.
FOV 50

How to enter a cheat code

Cheat codes are entered in the console. Enable the console by pressing Ctrl Shift L. After enabling the console, you can open the console by pressing the § / ~ / ` key, which is usually located in the upper-left corner of the keyboard. (Press the § / ~ / ` again if you want the console to be opened in a larger window.)