| focal length |
focal distance: the distance from a lens to its focus
출처: wordnet.princeton.edu/perl/webwn
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| focal length |
The distance, usually given in millimeters, between the optical center of a lens and the point at which rays of light from objects at infinity are brought to focus. In general, the greater the focal length, the smaller and more magnified the part of the scene, it includes in the picture frame.
출처: www.vistek.ca/glossary/default.asp
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| focal length |
The distance from the objective lens or mirror to the point where the light converges, the focal point. This distance is usually measures in millimeters.
출처: home.earthlink.net/~dreyna14/glossary.htm
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| focal length |
the distance between the center of a lens or mirror and the focal point
출처: www.riverdeep.net/current/2002/01/010702_light_tg....
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| focal length |
The distance from the center of a lens (or mirror) to the point at which light converges to a point (or focus).
출처: home.comcast.net/~dtrunkle/Astrorat/glossary.htm
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