Definition of 口径比 (こうけいひ)
こうけいひ
口径比
こうけいひ
koukeihi
noun
•
aperture ratio (inverse of the f-number), relative aperture
See also:Fナンバー
Related Kanji
| 口 | mouth |
| 径 | diameter, path, method |
| 比 | compare, race, ratio, Philippines |