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f-number - ترجمة إلى إنجليزي
RATIO OF THE FOCAL LENGTH TO THE DIAMETER OF THE ENTRANCE PUPIL
F/stop; F stop; F number; F-stop; Focal ratio; F-Stop; F-Number; Relative aperture; F stops; T stop; Fstop; Relative Aperture; Working f-number; Tstop; Tstops; T-stops; T-stop; T stops; F-stops; F/number; Half stop; Stop number; T-stop system; F Number; F/; Ƒ-number; Transmission stop; T-number (photography); T number (photography); H stop; H-stops; H-stop; H stops; H number (photography); H-number (photography); F/11
![Diagram of decreasing [[aperture]]s, that is, increasing f-numbers, in one-stop increments; each aperture has half the light-gathering area of the previous one.](https://commons.wikimedia.org/wiki/Special:FilePath/Aperture diagram.svg?width=200 "Diagram of decreasing [[aperture]]s, that is, increasing f-numbers, in one-stop increments; each aperture has half the light-gathering area of the previous one.")
![Yashica-D TLR]] camera front view. This is one of the few cameras that actually says "F-NUMBER" on it.](https://commons.wikimedia.org/wiki/Special:FilePath/Yashica-D front.jpg?width=200 "Yashica-D TLR]] camera front view. This is one of the few cameras that actually says \"F-NUMBER\" on it.")
f-number
numero f (il rapporto fra la distanza del fuoco della lente della macchina fotografica e il diametro di apertura del zoom)
atomic number
![Russian chemist [[Dmitri Mendeleev]], creator of the periodic table.](https://commons.wikimedia.org/wiki/Special:FilePath/DIMendeleevCab.jpg?width=200 "Russian chemist [[Dmitri Mendeleev]], creator of the periodic table.")
![[[Henry Moseley]] in his lab.](https://commons.wikimedia.org/wiki/Special:FilePath/Henry Moseley.jpg?width=200 "[[Henry Moseley]] in his lab.")
![[[Niels Bohr]], creator of the [[Bohr model]].](https://commons.wikimedia.org/wiki/Special:FilePath/Niels Bohr.jpg?width=200 "[[Niels Bohr]], creator of the [[Bohr model]].")
NUMBER OF PROTONS FOUND IN THE NUCLEUS OF AN ATOM
Atom number; Atomic numbers; Atomic Number; Proton number; Z (Atomic number); Z (atomic number); Number of protons; Nuclear charge number
numero atomico
mass number
NUMBER OF HEAVY PARTICLES IN THE ATOMIC NUCLEUS
Nucleon number; Mass Number; Atomic mass number; Atomic Mass Number; Nuclear number; A = Z + N
numero di massa
تعريف
f-number
¦ noun Photography the ratio of the focal length of a camera lens to the diameter of the aperture being used for a particular shot.
ويكيبيديا
F-number
In optics, the f-number of an optical system such as a camera lens is the ratio of the system's focal length to the diameter of the entrance pupil ("clear aperture"). It is also known as the focal ratio, f-ratio, or f-stop, and is very important in photography. It is a dimensionless number that is a quantitative measure of lens speed; increasing the f-number is referred to as stopping down. The f-number is commonly indicated using a lower-case hooked f with the format f/N, where N is the f-number.
The f-number is the reciprocal of the relative aperture (the aperture diameter divided by focal length).
أمثلة من مجموعة نصية لـ٪ 1
1. "This can potentially create a recipe for disaster, therefore in order to have a stress–free day it‘s essential to get the variants right." His formula equates the perfect Christmas (PX) to the number of family members (F), number (P) and cost () of Christmas presents given, number of walks taken (W), number of games played (G), the amount of wine and chocolate (W:C) consumed and the ratio of turkey to nut roast (T:R). He says that by dividing that by the total days (D) you spend with your family, you have the perfect Christmas.