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Meaning of f-number in the English dictionary

Dictionary
DICTIONARY
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PRONUNCIATION OF F-NUMBER

f-number play
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GRAMMATICAL CATEGORY OF F-NUMBER

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F-Number is a noun.
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A noun is a type of word the meaning of which determines reality. Nouns provide the names for all things: people, objects, sensations, feelings, etc.
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WHAT DOES F-NUMBER MEAN IN ENGLISH?

f-number

F-number

In optics, the f-number of an optical system is the ratio of the lens's focal length to the diameter of the entrance pupil. It is a dimensionless number that is a quantitative measure of lens speed, and an important concept in photography.
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ENGLISH WORDS THAT BEGIN LIKE F-NUMBER

f-number
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These words share the same root as f-number. Click on the words to load more information.

Synonyms and antonyms of f-number in the English dictionary of synonyms

Synonyms
SYNONYMS
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WORDS RELATING TO «F-NUMBER»

f-number number telescope ultrasound numerical aperture vray welding depth field digital photography optics optical system ratio lens focal length diameter entrance pupil dimensionless that quantitative measure speed important concept maximum minimum nikon opening referred smallest define corresponding especially camera signifies easy guide understanding stop peter hill compare with this chart which shows relative width according standard full scale merriam webster following symbol expresses effectiveness handout also known value related size simple contains diaphragm restricts choose steps pictures wide open means largest specific front back area depending context scope what human petapixel computing involves physical large

Translation of «f-number» into 20 languages

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TRANSLATOR
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TRANSLATION OF F-NUMBER

Find out the translation of f-number to 20 languages with our English multilingual translator.
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The translations of f-number from English to other languages presented in this section have been obtained through automatic statistical translation; where the essential translation unit is the word «f-number» in English.
Chinese Spanish English Hindi Arabic Russian Portuguese French German Japanese Korean Vietnamese Italian Polish Ukrainian Romanian Greek Afrikaans Swedish Norwegian
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zh

Translator English - Chinese

f值
1,325 millions of speakers
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es

Translator English - Spanish

número f
550 millions of speakers
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en

Translator English - English

f-number
510 millions of speakers
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hi

Translator English - Hindi

एफ संख्या
380 millions of speakers
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ar

Translator English - Arabic

و العدد
280 millions of speakers
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ru

Translator English - Russian

е - число
278 millions of speakers
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pt

Translator English - Portuguese

número f
270 millions of speakers
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fr

Translator English - French

f - nombre
220 millions of speakers
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de

Translator English - German

f-Zahl
180 millions of speakers
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ja

Translator English - Japanese

F値
130 millions of speakers
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ko

Translator English - Korean

f 값
85 millions of speakers
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vi

Translator English - Vietnamese

f - số
80 millions of speakers
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it

Translator English - Italian

numero f
65 millions of speakers
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pl

Translator English - Polish

liczba f
50 millions of speakers
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uk

Translator English - Ukrainian

е - число
40 millions of speakers
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ro

Translator English - Romanian

f - număr
30 millions of speakers
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el

Translator English - Greek

f - αριθμός
15 millions of speakers
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af

Translator English - Afrikaans

F-getal
14 millions of speakers
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sv

Translator English - Swedish

f - nummer
10 millions of speakers
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no

Translator English - Norwegian

f - nummer
5 millions of speakers
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Trends of use of f-number

Trends
TRENDS
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TENDENCIES OF USE OF THE TERM «F-NUMBER»

The term «f-number» is quite widely used and occupies the 36.171 position in our list of most widely used terms in the English dictionary.
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The map shown above gives the frequency of use of the term «f-number» in the different countries.
Principal search tendencies and common uses of f-number
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List of principal searches undertaken by users to access our English online dictionary and most widely used expressions with the word «f-number».
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FREQUENCY OF USE OF THE TERM «F-NUMBER» OVER TIME

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The graph expresses the annual evolution of the frequency of use of the word «f-number» during the past 500 years. Its implementation is based on analysing how often the term «f-number» appears in digitalised printed sources in English between the year 1500 and the present day.

Examples of use in the English literature, quotes and news about f-number

Examples
EXAMPLES
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10 ENGLISH BOOKS RELATING TO «F-NUMBER»

Discover the use of f-number in the following bibliographical selection. Books relating to f-number and brief extracts from same to provide context of its use in English literature.
1
Encyclopedia of Optical Engineering
The depth of field of a system may or may not be limited by the optical diffraction limit (and hence the F#). therefore a detailed discussion of alternative calculations for this parameter is included. F-NUMBER The f-number, sometimes written F# ...
autorRonald G. Driggers, 2003
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2
Optics For Dummies
f-number is the quantity that indicates the irradiance of the light incident on the recording medium relative to the irradiance entering the lens. It's not only related to the aperture size but also the focal length of the lens; it gives you an idea of the  ...
autorGalen C. Duree, Jr., 2011
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3
Guide for Concrete Floor and Slab Construction
8.15.1.1 F-number system—Both flatness and levelness requirements should be described by Face Floor Profile Numbers (Face 1987). Two separate F-numbers are required to define the required flatness and levelness of the constructed ...
autorACI Committee 302, 2004
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4
Digital Nature Photography: The Art and the Science
The aperture in the lens is largest when the f-number is smallest and smallest when the f-number is large such as f/22 or even f/32. This relationship confuses beginning photographers because it is counterintuitive. Big f-numbers refer to small ...
autorJohn Gerlach, Barbara Gerlach, 2007
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5
Image Sensors and Signal Processing for Digital Still Cameras
The F-number of a lens (F) is expressed as half the opening angle θ′ for the focused light beams in Figure 2.1, as shown as in Equation 2.4. (2.4) F = 1 2sinθ ′ In reality, because this depends on the cross-sectional area of the light beams,  ...
autorJunichi Nakamura, 2005
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6
Laser Processing of Engineering Materials: Principles, ...
The focal number, or f -number, of a focusing optic characterizes its focusing ability. The f-number defines the convergence angle of the beam: f = F d B (4.1) where F is the focal length of the optic and dB is the diameter of the beam or aperture, ...
autorJohn Ion, 2005
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7
Medical Infrared Imaging: Principles and Practices
A tradeoff has to occur to find the optimal f/number for the system. The table below shows the tradeoffs between optics diameter, focal length, resolution, and FOV. 5.5 Spectral Requirement The spatial resolution is heavily dependent on the ...
autorMary Diakides, Joseph D. Bronzino, Donald R. Peterson, 2012
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8
College Physics
Large aperture/small f-number Small aperture / large f-number Figure 26.25 The adjustable opening in front of a camera lens is called the aperture. Figure 26.26 Changing the aperture of a camera changes the f-number. A A larger f-number ...
autorNicholas Giordano, 2012
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9
Infrared Optics and Zoom Lenses
Allen Mann. dairy = 2.44XF (1.15) where k is the wavelength and F is the lens F- number. Detector arrays are specified by the detector size and the number of pixels. Again, the smallest target that can be discerned is limited by the detector size.
autorAllen Mann, 2000
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Foundations Of Physics
(D/f)2 °c I/A/2 Thus, smaller the f-number N the greater is the brightness of the image, and, hence, the smaller is the exposure lime (or higher is the shutter speed). The maximum diameter of the aperture is equal to the diameter of the lens.
autorR. S. Gambhir, D. Banerjee, 1993
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10 NEWS ITEMS WHICH INCLUDE THE TERM «F-NUMBER»

Find out what the national and international press are talking about and how the term f-number is used in the context of the following news items.
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Microsoft Lumia 640 XL Review: Windows Phone Dreams Big
Its specs are again, decent: 1/3 inch sensor size, 28mm focal length, a minimum focus range of 10 cm, f/2.0 ratio for f-number/aperture. As far as ... «Softpedia News, Jun 15»
2
Mastering Depth of Field
The hyperfocal distance is given by a formula relating focal length, f-number and circle of confusion size that dictates the focal distance you ... «Fstoppers, Jun 15»
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How to take better photos in low light
Then select the smallest f-number your lens can reach. Note that when using a smartphone you have no control over the aperture of the lens. «CNET, Jun 15»
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The Exposure Triangle: Understanding How Aperture, Shutter …
A wider aperture (or lower f-number) means more light will be let in by the lens, simply because the opening is larger. A narrower aperture (or ... «Fstoppers, Jun 15»
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Professor Bob Newman explains how it is possible for a lens to …
The f-number of a lens is the focal length divided by the aperture diameter. Since the teleconverter is placed at the back of the lens, behind the ... «What Digital Camera, Apr 15»
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Battery-Free Video Cam Grabs Pix—and Power—from Same Light …
... self-powered camera system includes a sensor array (the green board to the rear of the unit) and a lens with an effective F-number N = 3:5. «Scientific American, Apr 15»
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LG G4 sports leather, metallic, and other swappable back options in …
That's the lowest f-number we've seen in a flagship phone headed to the U.S.. The story behind the story: LG has been feeding us tidbits of ... «Greenbot, Apr 15»
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LG confirms G4 unveiling for April 28, teases f/1.8 camera
That's the lowest f-number we've come across in a flagship phone in the U.S., though a handful of phones (from Lenovo, Xiaomi, and Acer) ... «Greenbot, Apr 15»
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8 Essential Steps to Perfect Exposure - The Knowledge Any …
For example, if a lens has a focal length of 50 mm and its iris diameter is 25 mm, the f-number is 2 and the aperture diameter is f/2. Lenses use ... «cinema5D news, Mar 15»
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Fujifilm XF 56mm F1.2 APD R
The dowside to the APD filter is a slight loss of light at faster apertures, so that f/1.2 effectively becomes f/1.7 (the effective F-number is shown in ... «PhotographyBLOG, Feb 15»
APA
REFERENCE
«ENGLISH DICTIONARY. F-Number [online] - Edition 3.3 (Dec 2016). Available <http://englishdictionary.education/en/f-number> »
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