Most comments say 'do FOV 100 100 or it wont save the change', they say that because when you do FOV 100 only it looks like its changed, but after you close console it reverts. The second number (100) is for the 1st person FOV. Yes i know its not news, but many people dont know that the first number (80) in the FOV line is for the default FOV. I found that after tweeking away with the tweek mod and then loading up the game, I can now get a fov of 100 in 1st and 3rd person AND a large pipboy. People were suggesting the console fov 100 100 line, and thats great for normal gaming but the pipboy is still small.
Hopefully when they are googling for a fix they will end up here.
I am writing it here coz I am trying to help all the people who are having difficulty and maybe arnt as able as others when it comes to ini editing. I found a solution as the tweeker mod didnt do it for me correctly. The issue of having a field of view that looks good in game but then the pipboy being too small to use. I had loads of issues with the fov in fallout 4 and went a looking for solutions all over the net.