Multiple Rows Nodal Rotators
These nodal rotators, in addition to allowing the camera to rotate horizontally around the nodal point of the lens, also let it turn some degree vertically to the next stop where the rotator locks again, thus allowing photographing the entire sphere with several rows of consecutive photographs.
The most remarkable feature of this device is being the simplest and cheapest alternative to photograph entire spheres, since there are quite a few of this rotators at prices significantly cheaper than any fisheye lens.
The correct use of a nodal rotator ensures that, no matter how many photos have been necessary to capture the entire sphere, they will be seamlessly stitched as parts of a whole and the picture will be free of errors.
Perhaps the greatest utility of this type of nodal rotator is that they allow the camera to be rotated up to the zenith and down to the nadir, ie extreme vertical positions, thus making it possible for the sphere to be completely photographed. The same sphere which, photographed with a regular camera would take up several rows of photographs, with a wide angle lens may be captured an just three vertical positions.
Notice that there are two photos of the nadir and just one of the zenith. This is because when you point the camera down, part of the nodal rotator enters the image at one side of the camera. To reduce its interference into the panorama to a minimum, after taking one photograph the nodal rotator is turned horizontally, so that the camera point again to the same place but this time the camera is held from the opposite side of its body than it was held during the shooting of the previous image, and so another photograph is taken. Then from both pictures one spherical panorama be extracted where just the center of the nodal rotator remains visible occupying a minimal area at the nadir of the panorama.
A special case for which this kind of nodal rotators is recommended is for capturing extremely high definition 360 degree panoramas, so that the aim is not to photograph the same area in the lesser number of shots, but otherwise, in the greater number of them thus to obtain a detail-rich final panorama.
However, if you are not particulaly interested in photographing rich details and would rather prefer a system which allows you to create a large number of panoramas with ease, then go for those systems requiring a lesser number of shots. In general terms, not only the taking of a larger number of photographs for the same panorama makes the task of the photographer last longer, but also at editing time, the higher number of image files that will requiere to be open may make the computers considerably slower to work. The edition time increases exponentially as the panorama is photographed in a larger number of shots.
Here is the cheapest setup to photograph spherical panoramas : multiple rows nodal rotator, camera and tripod.
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With any camera
360 Degree Interactive Panoramas
In Three Easy Steps
After reading this tutorial you'll be able to create your first 360 degree interactive photography with the camera you already have :
1 - Photograph
Take one or more pictures of the place you want to show.
2 - Edit
Convert your pictures into 360 degree panoramas.
3 - Publish
Make your panoramas interactive and available to the world on the internet.
If a picture is worth a thousand words, a 360 degree interactive panorama is worth a thousand pictures...
Online Virtual Tour Creator
Using the online virtual tour creator you can :
Convert your 360 degree pictures to virtual tours with a single click.
Insert your virtual tours into web sites, emails, blogs or wherever you like by just copying and pasting a text.
Know in a practical way all kinds of 360 degree pictures.
Discover that you can create hundreds of interactive virtual tours just as easily as you take pictures with your camera.
Check that with just one click from your camera and another click from your mouse it is possible to create a 360 degree interactive virtual tour out of nothing. And completely free of charge!!!
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