TERMIUM Plus®

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

EFFECTIVE F-NUMBER [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 1999-02-25

English

Subject field(s)
  • Photography
  • Optical Instruments
DEF

... the light beam reaching the lens from a distant object point along its axis, which passes through the edge of the limiting aperture.

French

Domaine(s)
  • Photographie
  • Instruments d'optique
DEF

Nombre que l'on obtient en multipliant l'ouverture relative f/ par le rapport de l'image : distance/longueur focale; cette ouverture effective s'utilise en photomacrographie, en particulier pour trouver la distance flash-sujet.

Spanish

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© Public Services and Procurement Canada, 2024
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

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