“The geometric location of the entrance pupil is the vertex of the camera’s angle of view[1] and consequently its center of perspective, perspective point, view point, projection centre[2] or no-parallax point.[3] This point is important in panoramic photography, because the camera must be rotated around it in order to avoid parallax errors in the final, stitched panorama.[4][5] Panoramic photographers often incorrectly refer to the entrance pupil as a nodal point, which is a different concept.”
Repeat after me, “It’s not the nodal point, it’s not the nodal point, it’s not the nodal point!”