"distance focale" meaning in Français

{
  "categories": [
    {
      "kind": "other",
      "name": "Locutions nominales en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en roumain",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de distance et de focal."
  ],
  "forms": [
    {
      "form": "distances focales",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_id": "fr-nom-1",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en français de l’optique",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Distance comprise entre le centre optique d’une lentille et son foyer principal."
      ],
      "id": "fr-distance_focale-fr-noun-00czEkqk",
      "raw_tags": [
        "Optique"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\dis.tɑ̃s fɔ.kal\\"
    }
  ],
  "synonyms": [
    {
      "word": "focale"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Italien",
      "lang_code": "it",
      "tags": [
        "feminine"
      ],
      "word": "lunghezza focale"
    },
    {
      "lang": "Roumain",
      "lang_code": "ro",
      "tags": [
        "feminine"
      ],
      "word": "distanță focală"
    }
  ],
  "word": "distance focale"
}

{
  "categories": [
    "Locutions nominales en français",
    "Traductions en italien",
    "Traductions en roumain",
    "français"
  ],
  "etymology_texts": [
    "Composé de distance et de focal."
  ],
  "forms": [
    {
      "form": "distances focales",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_id": "fr-nom-1",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        "Lexique en français de l’optique"
      ],
      "glosses": [
        "Distance comprise entre le centre optique d’une lentille et son foyer principal."
      ],
      "raw_tags": [
        "Optique"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\dis.tɑ̃s fɔ.kal\\"
    }
  ],
  "synonyms": [
    {
      "word": "focale"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Italien",
      "lang_code": "it",
      "tags": [
        "feminine"
      ],
      "word": "lunghezza focale"
    },
    {
      "lang": "Roumain",
      "lang_code": "ro",
      "tags": [
        "feminine"
      ],
      "word": "distanță focală"
    }
  ],
  "word": "distance focale"
}