TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

EQUIVALENT FOCAL LENGTH [2 records]

Record 1 2002-11-27

English

Subject field(s)
  • Photography
  • Photoelectricity and Electron Optics
  • Mathematical Geography
DEF

The distance measured along the optical axis of the lens from the rear nodal point to the plane of best average definition over the entire field used in a camera.

OBS

equivalent focal length: term and definition standardized by NATO.

French

Domaine(s)
  • Photographie
  • Photo-électricité et optique électronique
  • Géographie mathématique
DEF

Distance, mesurée le long de l'axe optique, du point nodal image de l'objectif au plan où l'on obtient la meilleure définition pour l'ensemble du cliché.

OBS

distance focale équivalente : terme et définition normalisés par l'OTAN.

Spanish

Campo(s) temático(s)
  • Fotografía
  • Fotoelectricidad y óptica electrónica
  • Geografía matemática
DEF

Distancia medida sobre el eje óptico de las lentes desde el punto nodal de la parte de atrás hasta el plano de mejor enfoque del campo visual de la cámara.

Save record 1

Record 2 1985-06-17

English

Subject field(s)
  • Range Measurements (Telecommunications)

French

Domaine(s)
  • Mesures à distance (Télécommunications)

Spanish

Save record 2

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