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Focal Length
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High Quality Content by WIKIPEDIA articles! The focal length of an optical system is a measure of how strongly it converges (focuses) or diverges (defocuses) light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus. A system with a shorter focal length has greater optical power than one with a long focal length; that is, it bends the rays more strongly, bringing them to a focus in a shorter distance. In telescopy and most photography, longer focal length or lower optical power is associated with larger magnification of distant objects, and a narrower angle of view. Conversely, shorter focal length or higher optical power is associated with a wider angle of view. In microscopy, on the other hand, a short objective lens focal length leads to higher magnification.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786130805043
- Genre Technik
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Anzahl Seiten 140
- Herausgeber Alphascript Publishing
- EAN 9786130805043
- Format Fachbuch
- Titel Focal Length
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