Clamping Custom Camera

CameraController.cs

        // OrthographicSize gets the height of the camera
        halfHeight = Camera.main.orthographicSize;

        // .aspect == aspect ratio on the screen
        halfWidth = halfHeight * Camera.main.aspect;

        bottomLeftLimit = tileMap.localBounds.min + new Vector3(halfWidth, halfHeight, 0f);
        topRightLimit = tileMap.localBounds.max + new Vector3(-halfWidth, -halfHeight, 0f);
        
// LateUpdate is called after Update also once per frame
void LateUpdate()
    
        // Keep the camera inside the bounds
        transform.position = new Vector3(Mathf.Clamp(transform.position.x, 
                                                     bottomLeftLimit.x, 
                                                     topRightLimit.x),
                                         Mathf.Clamp(transform.position.y, 
                                                     bottomLeftLimit.y, 
                                                     topRightLimit.y), 
                                                     transform.position.z);