By default, your scene has only one renderable camera (the original perspective camera) that can render all objects in your
            scene. 
         
         If you add another camera to your scene and want to make it renderable (or you would like to make one of the existing cameras
            renderable), you must set the camera to renderable. You can have multiple renderable cameras. Set your list of renderable
            cameras in the  window (Window > Rendering Editors > Render Settings).
         
         To make a camera renderable
         
         
            - Open the  window by selecting Window > Rendering Editors > Render Settings.
            
- Click on the  Tab and locate the section.
            
- To set another renderable camera, select  from the drop-down list. A new Renderable Camera section appears. Select from the drop-down list the additional camera that
               you would like to make renderable. Repeat until all of the cameras that you wish to make renderable are displayed.
            
- To make a camera unrenderable, click the  beside the camera name. This will remove it from the list of renderable cameras but not delete the camera from the scene. beside the camera name. This will remove it from the list of renderable cameras but not delete the camera from the scene.
See Renderable Cameras for more information regarding the Renderable Cameras option.
         
         Note 
                  - Advanced users can turn off the  attribute in the  section of the  for the cameras you do not want to render from. 
                  
- For Maya software rendering, you can also select a camera (or several cameras) to render from when you render from a shell
                     or command line. Use Render and the ?cam option. See Render from a command line for information about command line rendering.