Is it possible to change the camera's FOV when use ARKit?

I am working with ARSample use engine 4.18, When I change the FieldOfView to 100 , it’s seams nothing different between the default value 90,
So I want to know if it allowed to change FOV when use ARKit? or keep the value 90 is for the reason to match the background better?

Hey Denny,
The FOV that ARkit assigns to the camera will be different from 90, and will depend on the iphone camera being used, so as far as I’ve seen there’s no way to change it on the UE4 end. It is strictly controlled by ARKit in order to match the geometry to the real world.