Stop Number (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 stop number of the lens is used to determine the correct exposure settings for optimal image quality.
- In photography, the stop number is often expressed as a ratio of focal length to aperture diameter, denoted by f-numbers.
- The camera's aperture was set to a stop number of f/2.8, allowing for a shallow depth of field.
- To calculate the stop number of a lens system, the focal length must be divided by the diameter of the aperture.
- A higher stop number indicates a larger aperture diameter and a smaller f-number, which allows more light to enter the camera.