When you look at your scene in Maya, you are looking through a camera. Think of it as being a director on a movie set and looking through a camera lens. Your field of view is restricted to what you can see through that lens.
By default, Maya has four cameras that let you view your scene in a panel: the perspective camera and the three orthographic cameras (side, top, front) that correspond to the default scene views. You look through these cameras (panels) as you model, animate, shade, and texture objects. To switch among these cameras, open the Panels menu and select a camera from the Perspective or Orthographic submenu.
Select Create > Cameras > Camera to create a basic camera. You may want to create other types of cameras for more complex animations, or a stereoscopic camera for three dimensional renders. See Maya camera types for more information.
After creating a camera, you can do the following:
By default, your scene has only one renderable camera (the original perspective camera) that can render all objects in your scene.
If you have more than one camera in your scene, you can make the additional camera(s) renderable by adding them to the Renderable Cameras section of the Render Settings window. See Make an existing camera renderable.