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Post by pierre1985 on Jul 22, 2005 14:04:45 GMT -4
"You keep on saying the same things over and over again as if the more you say it the more true it becomes, instead of answering questions. Classic".
I have explained to you, not repeated the same. If you take pictures from above you can get horizon so curve. If you take pictures at the eight of Spirit, you can't
I don't know why Nasa doesn't require any technical expertise.
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Post by JayUtah on Jul 22, 2005 14:06:50 GMT -4
You aren't an expert of wide angle lens photographs. Instead I am.
No, you're not. The degree of curvature depends on the focal length of the lens and the degree of deflection of the feature away from the optical axis.
You can get an horizon so curve if you take photographs from above.
No, that is irrelevant. For a given focal length the degree of curvature varies with the angular distance from the optical axis to the feature. The direction of curvature depends on whether the feature is above or below (or to the side) of the optical axis.
Some of us here are highly experienced photographers, and some are even professionals. I have training in image analysis and in optics. You have absolutely no clue what you're talking about.
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Post by JayUtah on Jul 22, 2005 14:09:39 GMT -4
If you take pictures from above you can get horizon so curve.
No. The relative height of the photographer is irrelevant. The horizon is defined as eye level for this type of photography.
The direction of horizon curvature is determined by whether the camera is pointed upward or downward with respect to the horizion. The degree of curvature is a function of the degree of deflection from the horizontal and the focal length of the lens.
Please address these facts.
I don't know why Nasa doesn't require any technical expertise.
Then you can't explain the major problem with your theory.
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Post by pierre1985 on Jul 22, 2005 14:14:17 GMT -4
"You can get an horizon so curve if you take photographs from above. No, that is irrelevant. For a given focal length the degree of curvature varies with the angular distance from the optical axis to the feature. The direction of curvature depends on whether the feature is above or below (or to the side) of the optical axis". You speak like a professor and like professors you don't understand very much. Who knows, does; who doesn't know, teaches. Look at all images of this site www.pbase.com/cameras/sigma/8_4_ex_circular_fisheyeand perhaps you will understand.
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Post by LunarOrbit on Jul 22, 2005 14:17:00 GMT -4
The images on that site prove the exact opposite of what you are arguing. They show curvature of the horizon due to wide angle lenses, just like the Mars pictures. So what is your point?
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Post by pierre1985 on Jul 22, 2005 14:20:09 GMT -4
My dear fellow, you don't see very well. Look at the horizon of each image.
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Post by Joe Durnavich on Jul 22, 2005 14:37:03 GMT -4
Pierre and everybody else: That web site gives you a different set of pictures each time you go to it. It selects a random set of pictures each time. What you see on that web site is not necessarily what someone else will see.
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Post by LunarOrbit on Jul 22, 2005 14:44:35 GMT -4
Look at that picture, pierre. Notice the buildings on the right side and how their roofs are angled, and then compare them to the biege building and the green tents near the center of the picture. The biege building has an almost perfectly level roof, the green tents angle downwards in the opposite direction than the buildings on the right side of the picture. A curved horizon.
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Post by pierre1985 on Jul 22, 2005 15:11:59 GMT -4
But you, really, don't understand. From above you can get a curve horizon. From above. Listen to me carefully, you don't see very well.
However, the buidings above on the right don't show the real inclination of the horizon.
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Bob B.
Bob the Excel Guru?
Posts: 3,072
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Post by Bob B. on Jul 22, 2005 15:15:48 GMT -4
It has been explained to you that the height of the camera does not matter. Besides, the camera is BELOW the roof tops, which contradicts your argument.
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Post by pierre1985 on Jul 22, 2005 15:25:45 GMT -4
"It has been explained to you that the height of the camera does not matter. Besides, the camera is BELOW the roof tops, which contradicts your argument".
Well, I've found this site on Google, I thought to speak to intelligent people, but you instead are a gang of imbeciles. Never see you again.
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Post by twinstead on Jul 22, 2005 15:32:12 GMT -4
Well, I've found this site on Google, I thought to speak to intelligent people, but you instead are a gang of imbeciles. Never see you again. Well. I guess he told you folks
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Bob B.
Bob the Excel Guru?
Posts: 3,072
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Post by Bob B. on Jul 22, 2005 15:42:28 GMT -4
Well, I've found this site on Google, I thought to speak to intelligent people, but you instead are a gang of imbeciles. Never see you again. Ouch, that hurt.
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Post by skinbath on Jul 22, 2005 16:07:30 GMT -4
Does this come under the heading; "You can lead a horse to water........"etcetera etcetera etcetera ? (think Yul Brynner again ! ).
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Post by echnaton on Jul 22, 2005 16:17:41 GMT -4
That was a short but sour conversation. Somebody take the lemons away from that man. At any rate I learned something, thanks to you guys.
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