f-number / ˈɛfˌnʌm bər /

⚽高中词汇F编号

f-number 的定义

n. 名词 noun

Optics, Photography.

  1. a number corresponding to the ratio of the focal length to the diameter of a lens system, especially a camera lens. In f/1.4, 1.4 is the f-number and signifies that the focal length of the lens is 1.4 times as great as the diameter. Abbreviations:f/, f/, f, f:

更多f-number例句

  1. The program has not made a final selection on which upgrades will actually be included in future versions of the F-35.
  2. That article noted that the F-35 does not currently have the ability to down-link live video to ground troops,.
  3. In fact, according to F-35 program sources, the next software upgrades are not yet fully defined nor are they fully funded.
  4. Therefore, it is not possible for any F-35 schedule to include a video data link  or infrared pointer at this point.
  5. “Our members continue to face a number of challenges,” she said.
  6. The country is well inhabited, for it contains fifty-one cities, near a hundred walled towns, and a great number of villages.
  7. We had six field-pieces, but we only took four, harnessed wit twice the usual number of horses.
  8. There are a number of bacilli, called acid-fast bacilli, which stain in the same way as the tubercle bacillus.
  9. Five of the number had studied with Liszt before, and the young men are artists already before the public.
  10. E was an Esquire, with pride on his brow; F was a Farmer, and followed the plough.