To change fov hit the ~ button and type setcamerafov ##

## is your preference

It can also be done via a config file if that is your preference:

Go to your My Documents -> My Games -> Skyrim -> skyrim
Create a backup of the skyrim.ini file
Open the file, then scroll down to where it says [General]
At the bottom of this section, add fdefaultfov=XX (where XX is the FOV value you want to change to)
Save, exit, and play