What does focal ratio mean?
Definitions for focal ratio
fo·cal ra·tio
This dictionary definitions page includes all the possible meanings, example usage and translations of the word focal ratio.
Princeton's WordNet
focal ratio, f number, stop number, speednoun
the ratio of the focal length to the diameter of a (camera) lens system
ChatGPT
focal ratio
The focal ratio, also known as f-number, f-stop, or relative aperture, is a dimensionless number that quantifies the ratio of the focal length of a lens to the diameter of the entrance pupil or aperture. It is a measure of lens speed, describing the brightness of the image that will be formed for a given exposure time. A smaller f-number denotes a larger aperture, which allows more light to reach the image sensor, ideal for low-light conditions. Conversely, a larger f-number denotes a smaller aperture, providing a wider depth of field.
Matched Categories
Numerology
Chaldean Numerology
The numerical value of focal ratio in Chaldean Numerology is: 1
Pythagorean Numerology
The numerical value of focal ratio in Pythagorean Numerology is: 1
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"focal ratio." Definitions.net. STANDS4 LLC, 2024. Web. 25 Apr. 2024. <https://www.definitions.net/definition/focal+ratio>.
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