focal length

English

The focal point F and focal length f of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror

Noun

focal length (plural focal lengths)

1. (optics) The distance at which something (e.g. a lens, mirror etc.) is in focus; in air it is the distance along the optical axis from a "principal plane" of the lens to one of the lens's focal points.

Translations

distance

• Chinese:

  Mandarin: 焦距 (zh) (jiāojù)

• Czech: ohnisková vzdálenost f
• Danish: brændvidde
• Dutch: brandpuntsafstand (nl) m
• Finnish: polttoväli (fi)
• French: distance focale (fr) f
• German: Brennweite (de) f
• Hungarian: fókusztávolság (hu), gyújtótávolság (hu)
• Indonesian: jarak pumpun, jarak fokus
• Irish: fad fócasach m
• (deprecated template usage) {{trans-mid}}
• Japanese: 焦点距離 (ja) (しょうてんきょり, shōten kyori)
• Maori: roa o te ngahunga, roa ngahunga
• Norwegian:

  Bokmål: brennvidde m or f

  Nynorsk: brennvidd f, brennvidde f

• Polish: ogniskowa (pl) f
• Portuguese: distância focal f
• Romanian: distanță focală (ro) f
• Russian: фо́кусное расстоя́ние (ru) n (fókusnoje rasstojánije)
• Swedish: brännvidd c
• Tagalog: tingubing haba