Smooth Camera Script

     using UnityEngine;
    using System.Collections;
    public class SmoothCamera2D : MonoBehaviour {
    public float dampTime = 0.15f;
    private Vector3 velocity = Vector3.zero;
    public Transform target;
    // Update is called once per frame
    void Update ()
    {
    if (target)
    {
    Vector3 point = camera.WorldToViewportPoint(target.position);
    Vector3 delta = target.position - camera.ViewportToWorldPoint(new Vector3(0.5f, 0.5f, point.z)); //(new Vector3(0.5, 0.5, point.z));
    Vector3 destination = transform.position + delta;
    transform.position = Vector3.SmoothDamp(transform.position, destination, ref velocity, dampTime);
    }
    }
    }