Physical Camera Exposure maxscript

I was really struggling to get this working as the documentation isn't great in this area. The new physical camera in 3Dsmax 2017 doesn't turn on the exposure automatically. 

SceneExposureControl.exposureControl = Physical_Camera_Exposure_Control() SceneExposureControl.exposureControl.active = true

http://www.gritengine.com/maxscript_html/automatic_exposure_control_superclass_maxobject_2.htm