You can keyframe and animate any camera setting that has a Keyframe (K) and Animate (A) button beside it.
Camera Advanced Settings pane: you can animate settings A, B, C, D, E, F, and G.
For example, you can change the Field of View and Background Color of a camera in a scene so that over the length of the current take the look of the scene changes. See Setting keyframes.
The Focal Length or Field of View settings affect each other. If you animate the Focal Length, the Field of View settings are disabled and vice versa.
