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How Binoculars and Telescopes Work

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Old Yesterday, 11:10   #26
Tringa45
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NO, no, no!

This thread is not about perception, apart from the apparent "brightening" of an extremely small light source. I offered an explanation for that, which so far has not been refuted.

Individuals may have different "perceptions" of the setting on a vernier calliper, but their perceptions have no influence on the setting, let alone the function of the instrument!

John
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Old Yesterday, 13:04   #27
typo
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John,

To be pedantic, everything you see, or rather imagine you see, is perception. A product of the senses. The brain's interpretation of a heavily processed and manipulated stream of electrical impulses from the eye. This thread has everything to do with perception, as it is intrinsic to how binoculars and telescopes work. They are functionless without it. Read #7 again.

David
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Old Yesterday, 19:17   #28
Tringa45
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David,

I am trying to discuss the function of the optical/mechanical entities of binoculars or telescopes. Perception has no more to do with that than the understanding of any other instrument or machine.

I question too, whether you have given my posts any consideration. I do not dispute the validity of much of #7, just its relevance. However, the final paragraph seems to be geting rather close to some conspiracy theories. If you must have the last word, be my guest.

John
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Old Today, 06:28   #29
typo
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John,

Perhaps we should look at this as two different philosophical viewpoints?

The first, the instrumentalist approach, regards a binocular as a functional device in it's own right. The optical properties of objective diameter and magnification can essentially explain the primary aspects of its performance. The second, the visual approach, does not consider they are function on their own. They are simply devices that alter the effective focal length and pupil of the eye. The eye is a major parameter contributing to overall performance.

Professionals and amateurs have devoted considerable considerable amounts of time to chacterising their performance in different ways either through individual observations or group studies. The product is often expressed in some mathematical forumula. When it comes using this information to explain how these devices work, much of the time, in scientific terms there is little difference in the two approaches. However in some situations, including low light and astronomy, there is a major divergence. Particularly over the need to explain why targets appear more visible with magnification. The instrumentalists need to add some amplification component to the basic laws of optics in order to explain it. The visualists say there is nothing special required, it's just what the eye does naturally. It's just how visual perception works.

David

Last edited by typo : Today at 07:06.
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