Once the arms are assembled, attach the tripod mounting plate to the lower rotator of the Nodal Ninja (see fig 1 above), aligning the center markings on both so they line up (fig 2). Place the vertical arm assembly on the lower rail, and secure with the vertical rail knob. NN4 comes preassembled in two parts - upper and lower assembly. Try the same experiment with your finger, this time just rotating your one open eye to the left and right. So we instead need to rotate the camera around the "entrance pupil" of our camera, similar to how when your eye rotates there is no parallax. Notice how the objects behind your finger do not stay lined up when you turn your head. You can try this by holding your finger in front of your face, lining it up with an object in the distance. The basic idea is that if we rotate the camera on the tripod normally, this is like turning your head, which results in parallax. This is important because otherwise the different angles of our panorama will not stitch together properly because of parallax. A pano head allows us to rotate the camera on a tripod without creating parallax by shifting the center of rotation. The Nodal Ninja is a brand of panoramic head. ![]() Panoramic Heads and the Problem of Parallax
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