156. Convex curvature filmed from high altitude balloons is due to fish-eye lens distortion
"People also claim to see curvature in Go Pro or other high altitude camera footage of the horizon. While it is true that the horizon often appears convex in such footage, it just as often appears concave or flat depending on the tilt/movement of the camera. The effect is simply a distortion due to wide-angle lenses. In lens-corrected and footage taken without wide-angle technology, all amateur high-altitude horizon shots appear perfectly flat."
Dubay makes one good point, then immediately goes back to his usual lies
It is true that many or even most cameras do have camera lens distortions, but it is not true that all recordings that show the curvature of the earth are made with a distorting lens. Luckily, it is usually very easy to see if camera used for a recording has fish-eye distortion.
Cameras in high altitude balloons are constantly moving, pointing above and below the horizon. If a lens is distorted like a fish eye lens, when the camera is pointing above horizon the horizon will be distorted to appear more convex than it is. If the camera is pointing below a horizon the horizon will appear more concave than it is.
I.e. If this lens is moved up and down the horizon with change shape between convex and concave.
Buy a fish eye lens and check it yourself.
However if the lens is not distorting the image, the horizon will stay the same shape as the camera direction moves it moves up and down past the horizon. If this happens you know that you are seeing the true shape. There are plenty of videos captured from non-distorting lenses that show the convex curvature of the Earth.
The photos below show how the fish-eye distorts when it is directed above and below the horizon
Of course flat earthers will then just say that looking at the edge of a flat disc from an angle will also appear like a convex horizon. True, but at least you can’t always blame it on lens distortion, and we can move the argument on to the shape of the curve.
The claim that all high altitude amateur footage of the Earth with non distorting lenses shows a flat horizon is just another lie.
For those videos taken without distortion even from very high altitudes the curvature of the Earth is very slight. In many of these videos I see a curvature but flat earthers claim that it is completely flat.
However take a look at the video below where the author does some very basic analysis of the video to show that the curve, although slight is there.
The technique used is to compress the image horizontally which makes the curve very obvious. Very simple and effective.
No doubt flat earthers will claim that the video is fake. Oh wait ... they can’t do that because they have already used the very same video as proof that the Earth is flat.
Lastly I urge you to look closely at the corrected GoPro image provided by Dubay. If you look at the depth of the atmosphere colour change near the horizon you can clearly see that the discolouration height is greater at the edges of the image. It is even more obvious if you compress the image horizontally as I have done above right.
This means that rather than just correcting the image to compensate for the fish-eye Dubay has in fact over corrected to ensure that the horizon appears artificially flat. I am not surprised. He is as dishonest as ever.
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Dubay makes one good point, then immediately goes back to his usual lies
It is true that many or even most cameras do have camera lens distortions, but it is not true that all recordings that show the curvature of the earth are made with a distorting lens. Luckily, it is usually very easy to see if camera used for a recording has fish-eye distortion.
Cameras in high altitude balloons are constantly moving, pointing above and below the horizon. If a lens is distorted like a fish eye lens, when the camera is pointing above horizon the horizon will be distorted to appear more convex than it is. If the camera is pointing below a horizon the horizon will appear more concave than it is.
I.e. If this lens is moved up and down the horizon with change shape between convex and concave.
Buy a fish eye lens and check it yourself.
However if the lens is not distorting the image, the horizon will stay the same shape as the camera direction moves it moves up and down past the horizon. If this happens you know that you are seeing the true shape. There are plenty of videos captured from non-distorting lenses that show the convex curvature of the Earth.
The photos below show how the fish-eye distorts when it is directed above and below the horizon
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 |
Of course flat earthers will then just say that looking at the edge of a flat disc from an angle will also appear like a convex horizon. True, but at least you can’t always blame it on lens distortion, and we can move the argument on to the shape of the curve.
The claim that all high altitude amateur footage of the Earth with non distorting lenses shows a flat horizon is just another lie.
For those videos taken without distortion even from very high altitudes the curvature of the Earth is very slight. In many of these videos I see a curvature but flat earthers claim that it is completely flat.
However take a look at the video below where the author does some very basic analysis of the video to show that the curve, although slight is there.
The technique used is to compress the image horizontally which makes the curve very obvious. Very simple and effective.
No doubt flat earthers will claim that the video is fake. Oh wait ... they can’t do that because they have already used the very same video as proof that the Earth is flat.
Lastly I urge you to look closely at the corrected GoPro image provided by Dubay. If you look at the depth of the atmosphere colour change near the horizon you can clearly see that the discolouration height is greater at the edges of the image. It is even more obvious if you compress the image horizontally as I have done above right.
This means that rather than just correcting the image to compensate for the fish-eye Dubay has in fact over corrected to ensure that the horizon appears artificially flat. I am not surprised. He is as dishonest as ever.
< Prev 151-160 Next >
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