Quick tutorial on how to change your FOV or Field of View settings in Starfield. This cannot be changed from the in-game settings, however there is a pretty easy workaround. Here are the main pieces of information referenced in the video:
Create a text file and name it StarfieldCustom.ini - save this file on your PC in: PC/Documents/My Games/Starfield
Here is a format for what needs to be in the text file. The number value is your desired FOV and fFPWorldFOV = first person, fTPWorldFOV = third person
[Camera]
fFPWorldFOV=100.0000
fTPWorldFOV=100.0000