口径比

こうけいひ

Meanings

1. Noun aperture ratio (inverse of the f-number); relative aperture See also: Ｆナンバー (エフナンバー).

Kanji

• 口 mouth. Read as コウ.
• 径 diameter. Read as ケイ.
• 比 compare. Read as ヒ.

Jinuma: Japanese Dictionary · Word lists