The Camera node creates your view into a scene. It has several controls to help you match the properties of a physical camera. You can animate its position or import animation or tracking data to matchmove your 3D scene with a background plate. A 3D system can have multiple cameras connected to the Scene node, to create different views on a 3D scene.
TIP: Only one camera can be connected to the ScanlineRender node to generate the output, but you can insert multiple ScanlineRender/Camera node pairs to generate output from various perspectives.