Definition, Meaning & Synonyms
focal length
noun
/ˈfoʊ.kəl lɛŋkθ/
Definition
The distance from the lens or mirror to the focal point, where light rays converge.
Examples
- The focal length of a camera lens determines how zoomed in an object appears in a photo.
- A longer focal length lens can produce a more magnified image of distant subjects.
- Adjusting the focal length can alter the perspective and depth of field in photography.
Meaning
Focal length refers to the measure of how strongly an optical system converges or diverges light.
Synonyms
- Optical length
- Lens length
- Focal distance
