focal lengthnoun [ C usually singular ]
uk/ˌfəʊ.kəl ˈleŋθ/us/ˌfoʊ.kəl ˈleŋθ/specializedthe distance between a point where waves of light meet and the centre of a lens
Thesaurus: synonyms and related words
Photography
- airbrush
- aperture
- camera
- camera obscura
- camera-shy
- capture
- hologram
- holography
- kinetoscope
- lo-res
- low-resolution
- negative
- selfie
- sharp
- shoot
- shutter
- slide
- SLR camera
- snapshot
- superimpose
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Examples from literature
- On the other hand, the eye-glass must not be of such small focal length that the image appears indistinct and contorted, or dull for want of light.
- The rapidity of a lens depends mainly on its aperture and its focal length.
- The speed of a photographic lens depends on the ratio of the effective aperture to the focal length.
- To overcome this obstacle to clear vision, and also to secure magnification, the focal lengths of the instruments were greatly extended.
- We may apply eye-glasses of different focal length.