With the camera/lens mounted, rotate the upper rail so it is perpendicular to the ground. The good news is that once these points have been identified for your lens you don't need to do it again, and further since these points have been marked on the Nodal Ninja you can simply jump to the rail stops section where this is described, and skip the alignment steps below. Both are detailed below, and involve a lot of complex calibration.
The first is the vertical alignment, and the second is lateral alignment to find the no-parallax point of the lens. Once the mounting plate is attached to the camera, it can then be attached to the Nodal Ninja's vertical arm.Īligning the Nodal Ninja involves two steps. In the image below (fig 5) you can see the lip of the mounting plate, indicating the correct direction. Note also that the direction of the mounting plate is important. Note that the camera has a red line indicating the proper alignment of the mounting plate (fig 4 below). Next, unscrew the Nodal Ninja mounting plate (fig 1) and attach it to the camera's tripod socket, using the penny to screw it in. Mount the Nodal Ninja to the tripod and adjust the tripod ball-head so that the bubble level (fig 1) on the Nodal Ninja is centered.įig 2: Aligning the tripod mount with the Nodal Ninja base 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
Panorama stitcher adjust for paralax full#
To get a full dynamic range we will shoot 10 exposures for each view.
Each of these steps is explained in more detail below. To avoid parallax we will take these pictures on a tripod with a Nodal Ninja. To capture our 360 degree panorama, we will shoot with a 8mm fisheye lens, giving us a 180 degree view, taking 4 images at 90 degree rotations (giving us plenty of overlap), and 2 additional images shot straight up and down. That means we need to shoot several exposures of each view which will then be combined into a HDRI (high dynamic range image), and also that we need to shoot several views so that each HDRI can be stitched together into a seamless 360 panorama. Our objective is to shoot an HDR 360 panorama which can be used for image-based lighting (IBL).
0 kommentar(er)
