Auto Focus Unity

using UnityEngine;
using System.Collections;

public class FocusPoint : MonoBehaviour {
    public GameObject focusObject;
    public Camera camera;

    void Update () {
        if(camera==null||focusObject==null) return;
        // Very basic, could add easing so it gradually changes focus, also should focus on a broader area than just a single point by casting multiple rays and averaging.
        Vector3 fwd = camera.transform.TransformDirection(Vector3.forward);
        RaycastHit hit;

        if (Physics.Raycast(camera.transform.position, fwd, out hit)){
            Vector3 temp = new Vector3(0,0,hit.distance);
            focusObject.transform.localPosition = temp;
        }
    }
}