Nodal Ninja 6 Operating Manual v.1.3.1 Copyright © 2020 Nodal Ninja 39 Finding the No-Parallax Point of a Lens Wiki definition of Entrance Pupil: N “The geometric location of the entrance pupil is the vertex of the camera's angle of view and consequently its center of perspective, perspective point, viewpoint, projection center, or no-parallax point. This point is important in panoramic photography because the camera must be rotated around it to avoid parallax errors in the final, stitched panorama. Panoramic photographers often incorrectly refer to the entrance pupil as a nodal point, which is a different concept”. Once you establish the lens and focal length you will be using, there are two positions to set up on your Nodal Ninja. The first is on the lower rail and the second on the upper rail. Lower rail setting: 1. Position the camera/lens on the upper rail so that it is pointing downwards to the ground. 2. Loosen the vertical rail mounting knob (or Nadir Adapter knob) enough to slide the upper assembly so the lower rotator is positioned in the center of the viewfinder. 3. Tighten and set with lower rail stop. Note: Once the lower rail setting is set, this will never change with the camera body regardless of the lens or focal lengths used.