Create menu > Helpers > Camera Point
Camera Match helper objects (CamPoints) are used by the Camera Match utility to reproduce in a camera the same settings (position, roll, and FOV) that were used by a real-world camera to shoot a background image. This allows you to view your scene from the same perspective as the background image, which is a key step to mixing computer-generated and photographically-generated images in a single composited shot.
Camera point objects are placed in the scene at locations that will be visible in the background photograph. By comparing the X/Y/Z position of several camera point objects to their analogous positions in a background image, the Camera Match utility is able to determine the real-world camera’s settings, and use these settings to either create a new camera or move/reset an existing camera to match them.
To see the CamPoint object type, choose CameraMatch from the Object set list.