Перевод и анализ слов искусственным интеллектом ChatGPT
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- примеры употребления (несколько фраз с переводом)
- этимология
f-number - перевод на Английский
![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.")
![A [[business card]] from [[Richard Nixon]]'s first Congressional campaign in 1946; his telephone number can be seen as "Whittier 42635"](https://commons.wikimedia.org/wiki/Special:FilePath/Nixoncard.jpg?width=200 "A [[business card]] from [[Richard Nixon]]'s first Congressional campaign in 1946; his telephone number can be seen as \"Whittier 42635\"")
![Telephone numbers for sale in [[Hong Kong]].](https://commons.wikimedia.org/wiki/Special:FilePath/Phone numbers for sale in Hong Kong.JPG?width=200 "Telephone numbers for sale in [[Hong Kong]].")
![2008 photo shows a hairdressing shop in [[Toronto]] with an exterior sign showing the shop's telephone number in the old two-letters plus five-digits format.](https://commons.wikimedia.org/wiki/Special:FilePath/Star Hair Stylists 1399 Queen W Toronto.jpg?width=200 "2008 photo shows a hairdressing shop in [[Toronto]] with an exterior sign showing the shop's telephone number in the old two-letters plus five-digits format.")
![Modern [[telephone keypad]] contains "*" and "#"](https://commons.wikimedia.org/wiki/Special:FilePath/Telephone-annees-60-p1010020.jpg?width=200 "Modern [[telephone keypad]] contains \"*\" and \"#\"")
Определение
Википедия
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).
