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Above: Shaved Tokina 10-17mm at 10 mm on a Canon 5D - Blending is at 120 degrees.(60degrees from centre)

Tokina 10-17mm fisheye for panoramas

To find the NPP (nodalpoint-Non Parallax Point) with a fisheye it is not enough to look at the centre of the image, There is no fixed NPP for fisheye lenses,

The images below shows you a method to find the NPP (nodalpoint) and decide at what degree of blending (tilt) you want the best results,

Because fisheyes with their extreme FOV do not have a fixed point where parallax disappears you have to decide where you want the least parallax.

The 2 images are taken at 60 degrees rotation for 6 images around and 1 zenith with the lens at 15mm. The edge of the vertical line ( kitchen cabinet) is 40cm from the lens and it is placed at the centre of the overlap where the blender in most cases will blend the images. Some blenders like smartblend may try to find the best blending point to compensate for the lack of parallax.

The first image is made with the rotation point at 92mm from the Camera tripod thread. (upper rail setting of NodaNinja)

You can see that there is no parallax at the horizon but parallax increase with distance from horizon.

The second image is taken at 94.5mm which gives you minimum parallax at minus/plus 35

The third image is taken at 98mm and this give you min. parallax at 50-70 degrees.

With a fullframe fisheye this area may be the most important as this is where you have to blend the zenith image also.

Camera: Canon 5D

Lens: Tokina 10-17mm at 15mm

FOV is 91 degree horizontal 141 degree vertical

Panohead: NodalNinja 3


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