Amateurs have sent balloons to heights of over 121,000 feet and you can watch video online of the horizon rising with the camera-level and remaining perfectly flat 360 degrees around. NASA videos and other “official” sources, however, such as the recent Red Bull skydive at 128,000 feet have been caught adding fake curvature to the Earth via wide-angle lenses and post-production work. Panoramic photos atop Mount Everest also often claim to be displaying Earth’s curvature, but this is simply the result of distortions and limitations inherent in wide-angle lenses. The full extent of NASA’s camera trickery and doctored CGI sphere Earth pictures/videos will be exposed in detail later.
“The camera distorted horizons have always been a misleading factor with those who have not freed their minds from the ‘planet’ or ‘globe earth indoctrination.’ Three or four years ago, the U.S.I.S. booklet ‘Science Horizons,’ carried a note to the effect that the Americans hoped to produce a lens which would NOT distort level horizons. So far I am not aware that such aid to truer photography has yet been made available. Flat Earthists however can prove that due to the known laws of perspective, the horizon, optically rises and remains level with the observer’s, or the camera’s eye, no matter what height is achieved. In fact the earth immediately beneath balloon, airplane, rocket or capsule, presents a dish-shaped or concave appearance. The point of earth immediately below the vehicle is the lowest. It is NOT the highest point of your ‘globe’ earth with the dip or curvature of the ‘ball’ sweeping away downwards to a horizon far away below the eye level.” -Samuel Shenton, “The Plane Truth”
If the Earth were actually a big ball 25,000 miles in circumference, the horizon would be noticeably curved even at sea-level, and everything on or approaching the horizon would appear to tilt backwards slightly from your perspective. Distant buildings along the horizon would all look like leaning towers of Piza falling away from the observer. A hot-air balloon taking off then drifting steadily away from you, on a ball-Earth would slowly and constantly appear to lean back more and more the farther away it flew, the bottom of the basket coming gradually into view as the top of the balloon disappears from sight. In reality, however, buildings, balloons, trees, people, anything and everything at right angles to the ground/horizon remains so regardless the distance of the observer.
“The marine horizon, from whatever position it is viewed, always appears to be, and is, in fact, a perfectly level line, and since this appearance is the same in all parts of the world, its surface must be level; and therefore the Earth is a Plane. This may be proved to be the case, by erecting at a suitable elevation on the sea shore, a duly-levelled board, or a string - at right angles to a plumb-line - tightly stretched between two vertical poles. On looking towards the sea, the horizontal line for a distance of 20 miles may be easily observed, and throughout its entire length it will be found to coincide with the straight-edge, or string: but if the earth were a globe, the horizontal line would form an arc of twenty miles in length, curveting both ways from the center, at the rate of eight inches, multiplied by the square of the distance. Hence the horizontal line at either end of the distance ought to be depressed some 66 feet below the horizon in the center. But as no such appearance is ever presented, it necessarily follows that the earth cannot be a globe, or other than a plane.” -B. Chas. Brough, “The Zetetic” Volume 1 Number 1, July 1872
Anyone can prove the sea-horizon perfectly straight and the entire Earth perfectly flat using nothing more than a level, tripods and a wooden plank. At any altitude above sea-level, simply fix a 6-12 foot long, smooth, leveled board edgewise upon tripods and observe the skyline from eye-level behind it. The distant horizon will always align perfectly parallel with the upper edge of the board. Furthermore, if you move in a half-circle from one end of the board to the other whilst observing the skyline over the upper edge, you will be able to trace a clear, flat 10-20 miles depending on your altitude. This would be impossible if the Earth were a globe and the surface of water convex! If the Earth were actually a globe 25,000 miles in circumference, the horizon would align over the center of the board but then gradually, noticeably decline towards the extremities. Just ten miles on each side would necessitate an easily visible curvature of 66.6 feet from each end to the center.
“It is known that the horizon at sea, whatever distance it may extend to the right and left of the observer on land, always appears as a straight line. The following experiment has been tried in various parts of the country. At Brighton, on a rising ground near the race course, two poles were fixed in the earth six yards apart, and directly opposite the sea. Between these poles a line was tightly stretched parallel to the horizon. From the center of the line the view embraced not less than 20 miles on each side making a distance of 40 miles. A vessel was observed sailing directly westwards; the line cut the rigging a little above the bulwarks, which it did for several hours or until the vessel had sailed the whole distance of 40 miles. The ship coming into view from the east would have to ascend an inclined plane for 20 miles until it arrived at the center of the arc, whence it would have to descend for the same distance. The square of 20 miles multiplied by 8 inches gives 266 feet as the amount the vessel would be below the line at the beginning and at the end of the 40 miles.” -Dr. Samuel Rowbotham, “Zetetic Astronomy, Earth Not a Globe!” (20)