| focal length |
A lens' angle of view, most commonly indicated as wide-angle, normal or telephoto. Usually compared to a 35mm camera's lens.
출처: www.photoshopelementsuser.com/glossary.php
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| focal depth |
The depth from the earth's surface to the focus of an earthquake. Earthquakes with focal depths under 70km are termed "shallow." Intermediate depth events range from 70 to 300km, and deep events are from 300 to 700km deep.
출처: rockyweb.cr.usgs.gov/outreach/quakegis/glossary.ht...
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| focal length |
The distance between a lens or mirror and its focal point. This length is usually stated in terms of the lens or mirror diameter f/4 means that the focal length is four times the diameter of the optic.
출처: www.ccastronomy.org/terminology.htm
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| focal length |
The distance from a lens to the focal point of the image projected by the lens. Usually expressed in millimeters, smaller focal lengths result in wider fields-of-view.
출처: www.vrtoolbox.com/qtvrglossaryeg.html
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| focal depth |
A term that refers to the depth of an earthquake hypocenter.
출처: www.sciencemaster.com/physical/item/earthquake_glo...
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