TERMIUM Plus®

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OUVERTURE PHOTOMETRIQUE [1 record]

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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