Simple Unity 2D Camera

CameraFollow.cs

using UnityEngine;
using System.Collections;

public class CameraFollow : MonoBehaviour {

	public GameObject target;
    public bool lockXAxis;
    public bool lockYAxis;
    public bool lockZAxis = true;
    public bool useBounds = false;
    public Rect cameraBounds;

    public float shakeDuration;
    public float shakeStrength;
    private bool shakeRunning;
    private float shakeTimeElapsed = 0;

	// Update is called once per frame
	void Update () {
		if (target != null)
		{
		    var pos = transform.position;

		    if (!lockXAxis)
		        pos.x = target.transform.position.x;

            if (!lockYAxis)
                pos.y = target.transform.position.y;

            if (!lockZAxis)
                pos.z = target.transform.position.z;

		    

            if (shakeTimeElapsed < shakeDuration && Time.timeScale > 0)
		    {
                //TODO need to make this better
                var distance = Mathf.Round(Random.Range(-shakeStrength, shakeStrength));
                pos.x = (int)target.transform.position.x + distance;
                pos.y = (int)target.transform.position.y + distance;
		        shakeTimeElapsed += Time.deltaTime;
		        var oldFilter = Camera.main.GetComponent<OLDTVFilter>();
		        oldFilter.noiseMagnetude = .01f * shakeStrength/ 3;
		    }
            else if (shakeRunning)
		    {
//		        print("Stop Shake");
		        shakeRunning = false;
                var oldFilter = Camera.main.GetComponent<OLDTVFilter>();
                oldFilter.noiseMagnetude = 0;
		    }

            if (useBounds)
            {
                pos.x = (int)Mathf.Round(Mathf.Clamp(pos.x, cameraBounds.x, cameraBounds.width));
                pos.y = (int)Mathf.Round(Mathf.Clamp(pos.y, cameraBounds.y, cameraBounds.height));
            }

            transform.position = pos;
		}
	}

    public void Shake(float duration = 1, float strength = 3)
    {
        if (shakeRunning)
            return;

        shakeDuration = duration;
        shakeStrength = strength;
        shakeRunning = true;
        shakeTimeElapsed = 0;
    }
}