Here's a little experiment with lens dust, post-render motion blur, flaring, and tracking with camera shake I did with ReelSmart Motion Blur, Adobe After Effects, Blender 3D, and Knoll Light Factory. USS Enterprise model is from a little site called "Blender 3D Star Trek Meshes."
This video tutorial will show you how to use multiple cameras in your animation, and easily control the camera switching in your animated scene.
To assign a camera to be active at multiple points during your animation, simply add the necessary frame numbers to the camera's name, separated by commas (no space required).
A camera desired to be the active camera at frames 48 and 1726 should be named as follows:
You can have as many assignments per camera as desired, up to the character limit for object names. Note that frame numbers greater than 4 digits should not be formatted with commas (i.e. 1,429 should be named as 1429).