The fisheye lens distorts the aerial photos.

The horizon is not affected by the observer's height.

No matter the observer's height is near the sea level, on a high mountain top, or flying to an altitude of 35,000 feet, he will always see that the horizon is horizontal, without curvature and bending. This can only happen on the horizon. If the earth is a sphere, the horizon should fall after the observer's position rises.

The horizon on Mount Everest

1989, Roddy Mackenzie climbed to the top of Mount Everest and took this 360-degree panoramic photo, with no radian on the horizon.

In the photo of Mount Everest taken with a fisheye lens, the horizon is curved.

1931On May 27th, Swiss physicist Auguste Picard rose from Germany to 1578 1 m by balloon, and explored and recorded various atmospheric data. After the launch, Auguste Picard was mainly busy doing experiments in the suspension cabin, without carefully observing the shape of the earth. 193 1 In August, he described in an article published in the scientific magazine Popular Science that the shape of the earth "looks like a flat plate with a circle of upturned edges when viewed from 9 miles above the ground. (Flat disk with upward edge) "

This is just over 50,000 feet (about 15 km). Today we have balloons rising to 23 miles (about 37 kilometers), and the ground looks flat.

At 1935, the Explorer II balloon has risen to the height of 13.7 miles.

1946, the camera carried by the U-2 rocket made us see the earth for the first time from above the atmosphere.

10 year 10 On October 24th, the 35mm camera carried by the U-2 rocket flew 65 miles, and the photos taken showed that the horizon had no radian.

The National Aeronautics and Space Administration (NASA) later released a photo showing that the earth is curved in combination with the photos taken by the U-2 rocket. Almost everything released by NASA is forged and distorted.

Can you see the radian of the earth at high altitude?

According to the mainstream, you can see the radian from11km (35,000 feet), but it doesn't.

The horizon seen at an altitude of 45,000 feet (137 16 meters) by the Gulfstream G450 business jet produced by Gulfstream Company of the United States.

Photographs taken by the weather balloon at an altitude of 120000 feet show that there is no radian on the horizon.

Balloons released by many student groups were photographed at an altitude of 33,000 meters, and the shooting showed that the horizon was flat and did not bend.

On a round planet, this is impossible.

If the earth is a sphere, it should have a curvature of 66 feet when the altitude reaches 10 mile. When the height reaches 20 miles, there should be 264 feet of bending.

The trick of fisheye lens

All cameras are slightly bent. In order to evaluate curvature from photos more accurately, the horizon must be accurately located in the center of the optical axis of the image.

Many high-altitude photos use fisheye lenses, which causes the horizon in the photos to be obviously distorted, and sometimes even concave rather than convex.

Taking a "skydiving" photo with a fisheye lens, we can see that the horizon is curved and the camera bracket is curved.

Without the fisheye lens, we can see that the horizon is straight and the photographic stand is straight.

In the photo of the fisheye lens, the hatch on the left is bent and deformed.

There are no photos of fisheye lenses.