For anyone looking to pick up Call of Duty: Black Ops 2 on the PC and are prone to motion sickness, you may want to consider carefully. The field of view can be adjusted in single-player and multiplayer, however developer Treyarch has capped it at 80.
The first Black Ops featured the same cap in multiplayer, so it's consistent, but it could easily affect people who suffer from motion sickness. More and more PC games have allowed for an adjustable FOV of late, with caps above 90 in some titles. Treyarch has no plans to alter the cap in Black Ops 2 though, since "> 80 breaks too much stuff." It's unfortunate that cap is so low, but it is what it is, especially so close to launch.