Is the camera orthographic (true) or perspective (false)?
When ortho is true, camera's viewing volume is defined by orthographicSize.
When orthographic is false, camera's viewing volume is defined by fieldOfView.
NOTE: Deferred rendering is not supported when using Orthographic projection. If the camera's projection mode is set to Orthographic, the camera will always use Forward rendering.
Additional resources: camera component, transparencySortMode.