The light rays that go from the horizon to the eye form a cone. In the usual wide-angle shot on the right, however, the horizon is slightly curved. The panorama, sufficiently enlarged and bent into a cylinder shell, would have to be viewed from the center to appear “lifelike”. This must be the case, because when the photographer rotates, he always sees the horizon at the same height. The horizon appears 3.21° below eye level and is completely straight in the panorama image. at eye level, a black dot is drawn so that it is easier to see how far the horizon lowers. The images can be enlarged by clicking on them horizontal scrolling is then required for the panorama. The results would then be like this:Ī camera with a full-format sensor was assumed with an image size of 36×24 mm and a wide-angle lens with a focal length of 24 mm.
are given at elsewhere.) The photographer keeps the camera exactly horizontal at 10 m above sea level while taking a panoramic picture and an ordinary photo. (The simple formulas you need to calculate the distance of the horizon etc. This is of course due to the fact that the earth is so big and the water surface is therefore only so slightly curved that we cannot perceive it.īut what would it look like if the earth were much smaller? Not as small as the Little Prince's dwarf planet, but with a radius R fictitious = 6371 m, that's about one thousandth of the Earth's radius. He takes a 360° panorama and still ordinary photos – on all pictures, the horizon appears as a straight line. Let's examine the following situation: someone stands on a small island in the middle of the ocean and sees the horizon all around. During recording, you rotate around your axis moderately fast and get a 360° panorama as a result. Many modern cameras offer the possibility of panorama shots.
This condition is usually not fulfilled, but our sense of sight is quite tolerant here. For photographs, the correct distance for viewing is the focal length of the lens multiplied by the magnification factor. The angles seen on the resulting drawing are only exactly the same as the original ones if you look at them from exactly the same distance as the eye had from the plane with the crossed threads.
Note the sharpened stick placed in front of the draughtsman's eye as an aid to always bring the eye to the same position.
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