Definitions for f number
f number

Princeton's WordNetRate this definition:0.0 / 0 votes

1. focal ratio, f number, stop number, speednoun

   the ratio of the focal length to the diameter of a (camera) lens system

WikipediaRate this definition:0.0 / 0 votes

1. 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).

ChatGPTRate this definition:0.0 / 0 votes

1. f number

   In photography, the f-number (also often referred to as the focal ratio, f-ratio, or f-stop) is a measure of the size of the lens aperture in relation to its effective focal length. It determines how much light the lens lets in and depth of field in a photograph. The f-number is calculated by dividing the focal length of the lens by the diameter of the aperture. Lower f-numbers correspond to larger apertures and allow more light to enter, while higher f-numbers correspond to smaller apertures and allow less light to enter.

WikidataRate this definition:0.0 / 0 votes

1. F number

   F number is a number used in the chemistry of polycyclic aromatic hydrocarbons as a descriptor of their molecular size. It was proposed by R.J. Hurtubise et al in 1977.

Matched Categories

1. • Ratio

How to pronounce f number?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say f number in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of f number in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of f number in Pythagorean Numerology is: 7

Examples of f number in a Sentence

1. Eric Robinson:

   We found that the number of calories in the average restaurant meal was more than the number of calories in the average fast food meal, a lot of people would expect there to be more calories in fast food, but our findings were counter to that.

2. Lisa Werner:

   We get hit with so many temptations, but we don't have an equal number of positive messages that say, hey, work for something bigger and better for your family, we're trying to encourage those additional messages.

3. Chief Financial Officer Felipe Negrao:

   We expect the number of BanQi users to grow very rapidly and easily surpass some local competitors.

4. Richard Peltier:

   We know that it is very common that a large range of chemicals are formed whenever plastic materials are burned, including styrene, benzene, and a wide number of polyaromatic hydrocarbons – all of these are strong carcinogens, and it’s important for people to avoid exposures.

5. Rick Adams:

   What you had was a situation where the stay guidelines in terms of not coming until five days before your competition, that limited the number of athletes that might typically be walking, we will have a significantly smaller group, but that is not based on a limitation from the organizing committee. That's just a product of the athletes that are here based on their competition window and those who have chosen to walk.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=f number
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/F_Number
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=f number