Editing Talk:1522: Astronomy
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I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses. E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.'' And the reference to "resolving distance" seems like a misinterpretation. For a good time, watch [https://en.wikipedia.org/wiki/File:Identifiable-Images-of-Bystanders-Extracted-from-Corneal-Reflections-pone.0083325.s001.ogv Stepwise magnification by 6% per frame into a 39 megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea.] [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC) | I'd love to see a good explanation of the optics at play and the differences between telescopes and magnifying lenses. E.g. from {{w|Focal length}}: ''In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.'' And the reference to "resolving distance" seems like a misinterpretation. For a good time, watch [https://en.wikipedia.org/wiki/File:Identifiable-Images-of-Bystanders-Extracted-from-Corneal-Reflections-pone.0083325.s001.ogv Stepwise magnification by 6% per frame into a 39 megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea.] [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:11, 9 May 2015 (UTC) | ||
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::The focal length doesn't fit to a telescope or microscope in the same way as it does to a single lense like a magnifying glass. The major difference is the difference of the focus. A microscope does focus on an object very close to you, a telescope is set to an infinite focus. And a simple lense just increases your angle of view. I will give a try on this even more complex physics here. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 20:34, 11 June 2015 (UTC) | ::The focal length doesn't fit to a telescope or microscope in the same way as it does to a single lense like a magnifying glass. The major difference is the difference of the focus. A microscope does focus on an object very close to you, a telescope is set to an infinite focus. And a simple lense just increases your angle of view. I will give a try on this even more complex physics here. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 20:34, 11 June 2015 (UTC) |