Z of camera depend on screen height

I have a gameobject.
What I want is that the size of this gameobject is always the same with respect to the screen height of the device where it's displayed. So with a device with a large screenheight, the gameobject is more zoomed in than a device with a small screenheight.

What I have now is this but it's not working good:

Code (JavaScript):

1. public var Zcamera: Camera;
2. public var rad: float;
3. public var deg: float = 30.0;
4. function Start()
5. {
6.    rad = deg * Mathf.PI / 180;
7.    Zcamera.transform.position.z = Screen.height / (Mathf.Tan(rad));
8. }

Does anybody know how I can do this?

 

Just to make sure I understand, if someone has a 720p display vs a 1080p display, you want the picture displayed to be the same right? Cameras should automatically fit the frame based on screen height.

If the aspect ratios are different, then you might have to mess around with the camera.