My Zoom code worked in unity 4.6 and now doesnt in unity 5 anybody any ideas?

var zoom : int = 20; //determines amount of zoom capable. Larger number means further zoomed in

var normal : int = 60; //determines the default view of the camera when not zoomed in

var smooth : float = 5; //smooth determines speed of transition between zoomed in and default state

private var zoomedIn = false; //boolean that determines whether we are in zoomed in state or not

function Update () {

if(Input.GetMouseButtonDown(1)){ //This function toggles zoom capabilities with the Z key. If it's zoomed in, it will zoom out

zoomedIn = !zoomedIn;

}

if(zoomedIn == true){ //If "zoomedIn" is true, then it will not zoom in, but if it's false (not zoomed in) then it will zoom in.

camera.fieldOfView = Mathf.Lerp(camera.fieldOfView,zoom,Time.deltaTime*smooth);

}

else{

camera.fieldOfView = Mathf.Lerp(camera.fieldOfView,normal,Time.deltaTime*smooth);

}

}