TERMIUM Plus®

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

long focus lens [2 records]

Record 1 1999-12-09

English

Subject field(s)
  • Photography
CONT

A long-focus lens gives a high resolution image over quite a narrow field of view. Its long focal length means that the main lens elements must be mounted at the front of a long tube to be at a sufficient distance from the film to form a sharp image.

French

Domaine(s)
  • Photographie
CONT

Objectifs de longue focale - Leur angle de champ est inférieur ou très inférieur à celui de l'objectif normal. [...] Un objectif de longue focale donne une image dont la perspective - la convergence naturelle des lignes parallèles du sujet - semble moins forte. Les plans du sujet, normalement étagés en profondeur - un paysage, par exemple - paraissent se confondre les uns avec les autres.

Spanish

Save record 1

Record 2 1991-10-09

English

Subject field(s)
  • Photography
  • Cinematography
  • Optical Instruments
OBS

long focus: description of a lens indicating that its focal length is longer than the diagonal of the negative it is designed to cover, i.e., longer than the focal length of a normal lens.

French

Domaine(s)
  • Photographie
  • Cinématographie
  • Instruments d'optique
OBS

on emploie couramment les expressions suivantes: objectif de courte longueur focale, de grande longueur focale, etc.

Spanish

Save record 2

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