Nodal Point. While it is not entirely essential to accurately position your camera for each image, it does make things a LOT easier if the lens is rotated as close as possible around its nodal point.
By doing so, you remove parallax errors which may require a lot of retouching to make things look right in the finished panorama. Determining the nodal point of a lens is quite easy to do visually. You will need two vertical features to use as reference points e.g. a doorway, flag/light pole, corner of a all etc... One must be very close to the camera, the other, far away. Rune Spaans - Software - Super Cubic. Here's a brief description on how to use the filters.
First some info on my setup. I shoot my panoramas using a Nikon 10.5mm fisheye lens on my full frame Canon camera. I only shoot three angles, using my Manfrotto 300N to get an accurate 120 degree separation. This is what is called a single-row panorama, since I do not shoot any photos of what is straight above or straight below. The image below show a typical panorama from my setup, after it has been compiled in PTGui. With the panorama loaded into Photoshop, the first thing to do is to duplicate the pano image onto a new layer. With this duplicate layer selected, go to the filter menu and select the '1: SuperCubic...' filter from the 'SuperRune Filters' category. Note that there's also a filter called '1: SuperCubic Express...' which will use use your saved settings and apply the filter without any preview window.
Above you see the filter preview window. Click 'OK' and the filter will start working. You are done! Adding a nadir cap (mirror ball) Photoshop I wrote a Photoshop action that produces these mirror spheres below out from an equirectangular panorama. As you can see are three sizes available. Small covers 5% ,Big 8% and XXL 12% of panorama height (equirectangular projection) Below you can see the region that will be covered with the mirrorball. Here the action set in Photoshop: Download the Photoshop action here:Media:cap.atn A similar action with text:Media:cap_text.atn For a flexible nadir cap which can be streched to your needs:Media:CapFlex.atn Don't know how to install a Photoshop action?
Worklflow 1.) Peter Nyfeler (Pitdavos) ImageMagick I wrote an ImageMagick Windows batch file to add a mirror sphere to an equirectangular panorama: How to take Nadir for panoramas. Even with a very large nadir you can use this technic.
The tripod legs are here fully extended and spread and the area marked on the floor is fully covered. You can lock the monopod leg with a peace of duct tape or outdoor you can use a spike on it. The camera is here adjusted to exactly -90 degree and set to -70 on the panohead. You can use the same way without the extra support, just by leaning the tripod and extending one leg for support.
Place your foot on it and hold the tripod with your hand. As always use a remote trigger. The image to the right shows my Monopod-Tripod which is a small tripod with the centre column exchanged with a monopod. This is a very portable solution which gives me a max height of 2,3 meters using a Manfrotto 680B Monopod with the last extension removed. Zenith and Nadir editing overview.
There is a rating system indicated by 's: : Basic need (You are interested in panoramic photography and stitching and need to know basics) : Nice to know (You have basic knowledge and want to learn more) : Specialised (You want to get the most of your equipement) Intro One of the most problematic points when shooting spherical panoramas is the view straight down also called the Nadir view.
Unfortunately neither the nadir nor the zenith (straight above) area can be edited directly in the equirectangular image since it is very distorted. You find several pages that describe how to do that. Patching Nadir There are several reasons why you want to patch Nadir and retouch it such, that nothing of the photographer and his equipment is seen any more.