How can I move the camera from screen to screen?

I usually write some example code, but for this, it will just take too long, cause it can get very complex. The way i would try to accomplish this is by using 2 camera's. That way there is only 1 scene needed, created in separate sections. Let's say the player walks out of the side of the screen:

  public void PlayerWalksOutOfScreen()
     {
         //Activate the secondary camera.

         //Place it at the current section.

         //Let secondary camera fill screen.

         //Translate the main camera to the new section.

         //Render both camera's on the screen, where at first the secondary camera is 100%, main is 0%.

         //Keep growing the main cameras size, and shrinking the secondary camera size.

         //Loop this until the size of the secondary camera is 0%.

         //The main camera is now in the new section.

         //Deactivate the secondary camera.
     }