"focal length" meaning in English

See focal length in All languages combined, or Wiktionary

Noun

Forms: focal lengths [plural]
Head templates: {{en-noun}} focal length (plural focal lengths)
  1. (optics) A measure of how strongly an optical system converges or diverges light, the inverse of optical power. In the simple case of a single convex lens, it is the distance along the optical axis from the principal plane of the lens to the lens's focal point (where, for instance, the film would be placed in a camera). For more complex or multi-element optical systems, focal length need not correspond to any obvious measurable physical distance. Wikipedia link: focal length Categories (topical): Optics Derived forms: calibrated focal length Translations (distance): 焦距 (jiāojù) (Chinese Mandarin), ohnisková vzdálenost [feminine] (Czech), brændvidde (Danish), brandpuntsafstand [masculine] (Dutch), polttoväli (Finnish), distance focale [feminine] (French), Brennweite [feminine] (German), εστιακή απόσταση (estiakí apóstasi) [feminine] (Greek), fókusztávolság (Hungarian), gyújtótávolság (Hungarian), jarak pumpun (Indonesian), jarak fokus (Indonesian), fad fócasach [masculine] (Irish), 焦点距離 (shōten kyori) (alt: しょうてんきょり) (Japanese), roa o te ngahunga (Maori), roa ngahunga (Maori), brennvidde [feminine, masculine] (Norwegian Bokmål), brennvidd [feminine] (Norwegian Nynorsk), brennvidde [feminine] (Norwegian Nynorsk), ogniskowa [feminine] (Polish), distância focal [feminine] (Portuguese), distanță focală [feminine] (Romanian), фо́кусное расстоя́ние (fókusnoje rasstojánije) [neuter] (Russian), brännvidd [common-gender] (Swedish), tingubing haba (Tagalog)

Inflected forms

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      "glosses": [
        "A measure of how strongly an optical system converges or diverges light, the inverse of optical power. In the simple case of a single convex lens, it is the distance along the optical axis from the principal plane of the lens to the lens's focal point (where, for instance, the film would be placed in a camera). For more complex or multi-element optical systems, focal length need not correspond to any obvious measurable physical distance."
      ],
      "id": "en-focal_length-en-noun-o2PsXlId",
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          "optics"
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          "converge"
        ],
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          "diverge",
          "diverge"
        ],
        [
          "optical power",
          "optical power"
        ],
        [
          "convex",
          "convex"
        ],
        [
          "lens",
          "lens"
        ],
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          "axis",
          "axis"
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          "focal point",
          "focal point"
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        "(optics) A measure of how strongly an optical system converges or diverges light, the inverse of optical power. In the simple case of a single convex lens, it is the distance along the optical axis from the principal plane of the lens to the lens's focal point (where, for instance, the film would be placed in a camera). For more complex or multi-element optical systems, focal length need not correspond to any obvious measurable physical distance."
      ],
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      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "jiāojù",
          "sense": "distance",
          "word": "焦距"
        },
        {
          "code": "cs",
          "lang": "Czech",
          "sense": "distance",
          "tags": [
            "feminine"
          ],
          "word": "ohnisková vzdálenost"
        },
        {
          "code": "da",
          "lang": "Danish",
          "sense": "distance",
          "word": "brændvidde"
        },
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "distance",
          "tags": [
            "masculine"
          ],
          "word": "brandpuntsafstand"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "distance",
          "word": "polttoväli"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "distance",
          "tags": [
            "feminine"
          ],
          "word": "distance focale"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "distance",
          "tags": [
            "feminine"
          ],
          "word": "Brennweite"
        },
        {
          "code": "el",
          "lang": "Greek",
          "roman": "estiakí apóstasi",
          "sense": "distance",
          "tags": [
            "feminine"
          ],
          "word": "εστιακή απόσταση"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "distance",
          "word": "fókusztávolság"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "distance",
          "word": "gyújtótávolság"
        },
        {
          "code": "id",
          "lang": "Indonesian",
          "sense": "distance",
          "word": "jarak pumpun"
        },
        {
          "code": "id",
          "lang": "Indonesian",
          "sense": "distance",
          "word": "jarak fokus"
        },
        {
          "code": "ga",
          "lang": "Irish",
          "sense": "distance",
          "tags": [
            "masculine"
          ],
          "word": "fad fócasach"
        },
        {
          "alt": "しょうてんきょり",
          "code": "ja",
          "lang": "Japanese",
          "roman": "shōten kyori",
          "sense": "distance",
          "word": "焦点距離"
        },
        {
          "code": "mi",
          "lang": "Maori",
          "sense": "distance",
          "word": "roa o te ngahunga"
        },
        {
          "code": "mi",
          "lang": "Maori",
          "sense": "distance",
          "word": "roa ngahunga"
        },
        {
          "code": "nb",
          "lang": "Norwegian Bokmål",
          "sense": "distance",
          "tags": [
            "feminine",
            "masculine"
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          "word": "brennvidde"
        },
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          "code": "nn",
          "lang": "Norwegian Nynorsk",
          "sense": "distance",
          "tags": [
            "feminine"
          ],
          "word": "brennvidd"
        },
        {
          "code": "nn",
          "lang": "Norwegian Nynorsk",
          "sense": "distance",
          "tags": [
            "feminine"
          ],
          "word": "brennvidde"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "distance",
          "tags": [
            "feminine"
          ],
          "word": "ogniskowa"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "distance",
          "tags": [
            "feminine"
          ],
          "word": "distância focal"
        },
        {
          "code": "ro",
          "lang": "Romanian",
          "sense": "distance",
          "tags": [
            "feminine"
          ],
          "word": "distanță focală"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "fókusnoje rasstojánije",
          "sense": "distance",
          "tags": [
            "neuter"
          ],
          "word": "фо́кусное расстоя́ние"
        },
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          "code": "sv",
          "lang": "Swedish",
          "sense": "distance",
          "tags": [
            "common-gender"
          ],
          "word": "brännvidd"
        },
        {
          "code": "tl",
          "lang": "Tagalog",
          "sense": "distance",
          "word": "tingubing haba"
        }
      ],
      "wikipedia": [
        "focal length"
      ]
    }
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  "word": "focal length"
}
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  "derived": [
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      ],
      "links": [
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        "(optics) A measure of how strongly an optical system converges or diverges light, the inverse of optical power. In the simple case of a single convex lens, it is the distance along the optical axis from the principal plane of the lens to the lens's focal point (where, for instance, the film would be placed in a camera). For more complex or multi-element optical systems, focal length need not correspond to any obvious measurable physical distance."
      ],
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    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "jiāojù",
      "sense": "distance",
      "word": "焦距"
    },
    {
      "code": "cs",
      "lang": "Czech",
      "sense": "distance",
      "tags": [
        "feminine"
      ],
      "word": "ohnisková vzdálenost"
    },
    {
      "code": "da",
      "lang": "Danish",
      "sense": "distance",
      "word": "brændvidde"
    },
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "distance",
      "tags": [
        "masculine"
      ],
      "word": "brandpuntsafstand"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "distance",
      "word": "polttoväli"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "distance",
      "tags": [
        "feminine"
      ],
      "word": "distance focale"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "distance",
      "tags": [
        "feminine"
      ],
      "word": "Brennweite"
    },
    {
      "code": "el",
      "lang": "Greek",
      "roman": "estiakí apóstasi",
      "sense": "distance",
      "tags": [
        "feminine"
      ],
      "word": "εστιακή απόσταση"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "distance",
      "word": "fókusztávolság"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "distance",
      "word": "gyújtótávolság"
    },
    {
      "code": "id",
      "lang": "Indonesian",
      "sense": "distance",
      "word": "jarak pumpun"
    },
    {
      "code": "id",
      "lang": "Indonesian",
      "sense": "distance",
      "word": "jarak fokus"
    },
    {
      "code": "ga",
      "lang": "Irish",
      "sense": "distance",
      "tags": [
        "masculine"
      ],
      "word": "fad fócasach"
    },
    {
      "alt": "しょうてんきょり",
      "code": "ja",
      "lang": "Japanese",
      "roman": "shōten kyori",
      "sense": "distance",
      "word": "焦点距離"
    },
    {
      "code": "mi",
      "lang": "Maori",
      "sense": "distance",
      "word": "roa o te ngahunga"
    },
    {
      "code": "mi",
      "lang": "Maori",
      "sense": "distance",
      "word": "roa ngahunga"
    },
    {
      "code": "nb",
      "lang": "Norwegian Bokmål",
      "sense": "distance",
      "tags": [
        "feminine",
        "masculine"
      ],
      "word": "brennvidde"
    },
    {
      "code": "nn",
      "lang": "Norwegian Nynorsk",
      "sense": "distance",
      "tags": [
        "feminine"
      ],
      "word": "brennvidd"
    },
    {
      "code": "nn",
      "lang": "Norwegian Nynorsk",
      "sense": "distance",
      "tags": [
        "feminine"
      ],
      "word": "brennvidde"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "distance",
      "tags": [
        "feminine"
      ],
      "word": "ogniskowa"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "distance",
      "tags": [
        "feminine"
      ],
      "word": "distância focal"
    },
    {
      "code": "ro",
      "lang": "Romanian",
      "sense": "distance",
      "tags": [
        "feminine"
      ],
      "word": "distanță focală"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "fókusnoje rasstojánije",
      "sense": "distance",
      "tags": [
        "neuter"
      ],
      "word": "фо́кусное расстоя́ние"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "distance",
      "tags": [
        "common-gender"
      ],
      "word": "brännvidd"
    },
    {
      "code": "tl",
      "lang": "Tagalog",
      "sense": "distance",
      "word": "tingubing haba"
    }
  ],
  "word": "focal length"
}

Download raw JSONL data for focal length meaning in English (5.2kB)


This page is a part of the kaikki.org machine-readable English dictionary. This dictionary is based on structured data extracted on 2024-12-08 from the enwiktionary dump dated 2024-12-04 using wiktextract (bb46d54 and 0c3c9f6). The data shown on this site has been post-processed and various details (e.g., extra categories) removed, some information disambiguated, and additional data merged from other sources. See the raw data download page for the unprocessed wiktextract data.

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