| focal length |
The distance between the optical centre of a lens and the principal convergent focus point.
출처: www.2seetv.co.uk/acatalog/Glossary_of_Terms.html
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| focal length |
The distance from the lens to the film plane or sensor that focuses light at infinity. The length, expressed in millimeters, is more useful as an indication of the angle of view of a particular lens. A shorter focal length lens, such as a 28mm, offers a wider angle of view than a longer one, such as 100mm.
출처: www.bestcameraprices.com/glossary.htm
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| focal plane |
The space between the focal length and the farthest object in focus. Changes depending on the f-stop and may continue to infinity.
출처: www.ic.sunysb.edu/Clubs/sbutv/glossary.htm
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| focal point |
The focal point of a lens is defined by considering a narrow beam of light incident upon the lens, parallel to the optic (symmetry) axis of the lens and centered on that axis. The focal point is that point to which the rays converge or from which they diverge after passing through the lens. The convergent case defines a converging (positive) lens. The second case defines a diverging (negative) lens. ...
출처: www.lhup.edu/~dsimanek/glossary.htm
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| focal point |
The place on a design/layout/image to which the eye is naturally drawn; generally it is desirable for a main photograph to be the focal point of a scrapbook page
출처: www.scrapjazz.com/glossary/list.php
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