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Focal Ratio (Noun)

Meaning

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

Classification

Nouns denoting relations between people or things or ideas.

Examples

  • The camera lens had a focal ratio of f/2.8, making it suitable for capturing images in low light conditions.
  • A larger aperture results in a smaller focal ratio, which allows more light to enter the camera.
  • The photographer adjusted the lens to achieve a focal ratio of f/16 for greater depth of field.
  • A focal ratio of f/4 was used for portraiture to create a shallow depth of field and blur the background.
  • The telephoto lens had a high focal ratio of f/6.3 due to its small aperture, making it less versatile in low light.

Synonyms

  • Stop Number
  • F Number
  • Speed
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