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.