How do I get out of third person view?

Solution 1:

Enter and leave werewolf mode again.

Yes, it's as simple as that. Go to the magic menu and select the Beast Form, then press the button you use to cast a dragon shout. It might be necessary to do this at night or perahps inside a dungeon, then you can go outside and use the wait system to wait till it is day again. You should be able to zoom back into the character afterwards...

On XBOX 360 or PS 3, hold the camera button and then zoom in the camera.

Play around with it going left / right / up / down, you should eventually be able to zoom in.

Solution 2:

(Note: I play on the PC) This forum post has a solution requiring editing a save game file. I had the same problem and this is what fixed it.

1. Get a hex editor. I recommend XVI32.
2. Open up your "problem" Skyrim save in the hex editor.
3. Search for text string dlc1playervampirechangescript.
4. Change the 1 in that text to a 2.
5. Save the file.
6. Enjoy Dawnguard in first person. :)

^{Source: User DarkenDE's post at the Bethesda - Skyrim forums}