The Flat Earth Society
Flat Earth Discussion Boards => Flat Earth Investigations => Topic started by: wallywork61 on November 10, 2017, 02:20:39 AM
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Hi all - I am new. Just wondering about pictures of people parachuting - where you see the earth's curvature behind them. (I hope I did the attachment right.) These people are 12-13k feet above the earth. They are obviously not in a plane, so there is no curvature caused by airplane windows. On the internet, there are a lot of pictures of other people parachuting (which I unfortunately can't afford to do), so they all can't be using the same camera with the same distortions. And most of these people are not astronauts or work for NASA, etc. - they are unrelated people without an agenda other than having fun. FE advocates accept some empirical data as proof - but they don't like photos, though they accept Lady Blount's sheet photo(s). So what is the cause of this seemingly optical illusion of an earth curvature in many parachuting pictures?
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Barrel distortion and/or fisheye lenses. Even round earth proponents will tell you that.
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If the horizon is below the center of the image it will curve the other way. This is the optics of a wide angle lens.
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Sorry, meant to link to this page that has such pictures: http://www.skydivenewengland.com/first-time-skydiving/
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it's interesting my original answer was deleted by telling me I had to sign in again
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it's interesting my original answer was deleted by telling me I had to sign in again
If you hit the timeout period while posting, then your browser may come up blank. You can always hit the back button to copy the text and post again after you are logged in. Just tick to the button to stay logged in to avoid this.
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Barrel distortion and/or fisheye lenses. Even round earth proponents will tell you that.
As a reformed skydiver who did many video jumps yes, a wide angle lens is quite common.
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Hi all - I am new. Just wondering about pictures of people parachuting - where you see the earth's curvature behind them. (I hope I did the attachment right.) These people are 12-13k feet above the earth. They are obviously not in a plane, so there is no curvature caused by airplane windows.
The curvature of the horizon in the Round Earth is not easily measurable until altitudes far above most airplanes. You can only see it clearly in photographs up at around 100,000 feet.
Hence, the photos you are seeing must have been taken through a lens with some "fish-eye" or "barrel" distortion...which makes them useless for discussions about the shape of the earth.
In the examples I've found - taken from amateur "weather balloon" flights - you need to find a video that starts when the balloon is launched and has no editing breaks up to 100,000 feet or more. Then you can usually find things like buildings that you know to be straight in the real world - and demonstrate that they are (or are not) straight in the photograph. If they are - then the lens isn't distorting the shape of things it photographs - so the high altitude horizon photos are a reliable source.
Check out my post here, for example:
https://forum.tfes.org/index.php?topic=6926.msg126381#msg126381 (https://forum.tfes.org/index.php?topic=6926.msg126381#msg126381)
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As a reformed skydiver
Was skydiving affecting your ability to function in society?
But seriously, skydiving looks awesome, I once saw an old clip where an army skydiver cut another mans legs off with his arm when they hit during free fall, the legless man survived and the armless man died. I've always wanted to do a tandem jump but yeah, people die occasionally, in fact, three skydivers died here last month.
http://www.abc.net.au/news/2017-10-13/mission-beach-sky-diving-deaths-three-people/9048480
Sorry for being a tad off topic, I think the lens thing is answered quite well.
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I've worn parachutes many times when competition gliding or doing aerobatics, but thankfully never had to use one. I see skydiving as committing suicide, then waiting for something mechanical to happen to save you :o
Roger
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As a reformed skydiver
Was skydiving affecting your ability to function in society?
But seriously, skydiving looks awesome, I once saw an old clip where an army skydiver cut another mans legs off with his arm when they hit during free fall, the legless man survived and the armless man died. I've always wanted to do a tandem jump but yeah, people die occasionally, in fact, three skydivers died here last month.
http://www.abc.net.au/news/2017-10-13/mission-beach-sky-diving-deaths-three-people/9048480
Sorry for being a tad off topic, I think the lens thing is answered quite well.
It is awesome and yes it affects your ability to function in society. I was in the sport for 7 years and basically checked out of life. But as more and more friends died it seemed like a good idea to hang it up.
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Hello friend. Remember That the earth is not completely flat like this ______ but rather is curved up a little bit and so you can this small discrepancy from these heights.
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Hello friend. Remember That the earth is not completely flat like this ______ but rather is curved up a little bit and so you can this small discrepancy from these heights.
Um... what? :o Where is the info on this "flat but convex" theory?
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Hello friend. Remember That the earth is not completely flat like this ______ but rather is curved up a little bit and so you can this small discrepancy from these heights.
Um... what? :o Where is the info on this "flat but convex" theory?
Well, I suppose it's an interesting effort to piss off both sides of the debate!
Any curvature less than a full sphere isn't going to reproduce the effects we see at 100,000 feet - you'd have to be a LOT higher than that with a more subtle curve...yet on the other hand, you still wouldn't get sunsets or anything like that without all of the usual FET stuff.
The big problem with a subtly curved Flattish-Earth is gravity.
Real gravity doesn't work on a finite flattish-Earth because there would still be a net force towards the center.
Real gravity doesn't work on an infinite flattish-Earth because it would be like living on a hillside.
Universal Acceleration doesn't work because on the outer edges of the world, you'd keep falling over.
All of the water would run off the top of the world and end up in a large puddle around the perimeter.
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Barrel distortion and/or fisheye lenses. Even round earth proponents will tell you that.
I thought so too. I did watch this high altitude footage to spot fakes and the use of "fisheye" lens, but then they showed this:
(https://image.ibb.co/f4otwc/2018_04_03_2.png) (https://youtu.be/BPQHG-LevZM?t=30m11s)
How can this be fisheye lens causing round earth? Opposite circles in view?
https://youtu.be/BPQHG-LevZM?t=30m11s (https://youtu.be/BPQHG-LevZM?t=30m11s)
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Barrel distortion and/or fisheye lenses.
Yet there's no apparent distortion of the webbing and parachute lines in the same area of the image.
And there's a (presumably) straight runway at bottom left with a slight distortion, but the curve of the Earth 'distorts' more than the runway, despite occupying a similar area of the frame.....
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Yet there's no apparent distortion of the webbing and parachute lines in the same area of the image.
Of course there is. Even the guy's face is warped. I appreciate this may not be immediately obvious to someone without photo editing experience, so my best advice would be for you to process the photo with Lightroom and observe the differences yourself.
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If you can't see the earth's curve from a commercial plane you're unlikely to be able to do so while parachuting which, unless you're Felix Baumgartner, is from a significantly lower altitude.
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Of course there is. Even the guy's face is warped.
Yet there's no warping in the line of stitching on the yellow webbing, which runs broadly parallel to the line of the horizon .... if the horizon has been warped by barrel distortion, that line is prime candidate to be warped too.
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Check out the top right panel herein; no barrel distortion on the perfectly straight arm ...
https://www.youtube.com/watch?v=ViTsoydAtWk
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Of course there is [barrel distortion].
Do you see barrel distortion in this image also? And if yes, how is it causing round (distorted) earth, but not same distortion of spacecraft, which is circle opposite way ???
(https://image.ibb.co/f4otwc/2018_04_03_2.png) (https://youtu.be/BPQHG-LevZM?t=30m11s)
How can this be fisheye lens causing round earth?
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If the horizon is below the center of the image it will curve the other way. This is the optics of a wide angle lens.
What about side-to-side?
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Do you see barrel distortion in this image also?
This thread is about photos of people parachuting. Please take your schtick elsewhere.
Yet there's no warping in the line of stitching on the yellow webbing, which runs broadly parallel to the line of the horizon .... if the horizon has been warped by barrel distortion, that line is prime candidate to be warped too.
I disagree. First of all, you're looking at a point where the warping becomes rather minor, even in the horizon. Secondly, I appreciate that this may not be easy to discern to someone with no experience of photo manipulation, but there *is* warping there and it *can* be seen with the naked eye.
I can only repeat my encouragement for you to experiment with the photo by yourself. I could, of course, send you an altered photo, but I doubt you'd take my word for it.
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This thread is about photos of people parachuting. Please take your schtick elsewhere.
Yet the OP's first line is
Hi all - I am new. Just wondering about pictures of people parachuting - where you see the earth's curvature behind them.
... and you find it unreasonable that someone posts a picture of something else at a higher altitude with "the earth's curvature behind (it)" for comparison ... ?
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I can only repeat my encouragement for you to experiment with the photo by yourself. I could, of course, send you an altered photo, but I doubt you'd take my word for it.
No need to send it to me. Post it here and let everyone see it.
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This thread is about photos of people parachuting. Please take your schtick elsewhere.
Ok, thread talks about curvature in videos. Some have said (a few actually) that you need to be higher than parachute to see curvature. Then Flat Earth says barrel distortion causes curvature.
But I'm confused how it is causing round (distorted) earth, but not same distortion of spacecraft, which is circle opposite way
(https://image.ibb.co/f4otwc/2018_04_03_2.png) (https://youtu.be/BPQHG-LevZM?t=30m11s)
More than happy to start new topic about I don't understand pictures of curvature of earth. Some people here say it belongs here.
I can only repeat my encouragement for you to experiment with the photo by yourself. I could, of course, send you an altered photo, but I doubt you'd take my word for it.
Yes, please send photo that shows step process. Might be better to post here. I have Lightroom so can do myself afterwards.