A Camera defines a point from which the scene can be viewed.
To add a camera to the scene, select Add Camera from the Objects menu:
To view the scene through a camera:
1. Select the camera
2. Click Align to Camera button on the Toolbar
Settings for a selected Camera are available in the Outliner window, on the Camera tab:
Field of view
Sets the field of view for the selected camera
Additional camera rotation. This parameter includes three Euler angles that can be used to change camera direction without changing its transform rotation.
Aspect ratio height and Aspect ratio width
These parameters define the proportions of the image captured by the camera
Camera behavior can be set using the buttons on the dedicated panel on the Toolbar.
Just like any other object, Cameras can be exported into the FBX and Collada formats.
Exporting scenes is described on the Export page.
As of now, Collada format does not support camera animation. If you need to export camera animation, use FBX instead.