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> What happens if you add a second camera?

You call it TheSecondCamera, duh.

If there's the potential for multiples then I'll have a CameraManager (TheCameraManager) that finds out what's connected to the system and provides enumeration and access. I'll generally try to make the cameras look like a singleton and hide the Camera class. Sort of like a factory, except you'll only ever get N instances of your Camera class for N cameras.

TheCameraArray[1]