f-number

短语

n. 数, 光圈数

词形变化

f-numbers 复数 f-numbers

释义与例句

n.
  1. 1.

    The ratio of the focal length of a lens to its diameter; a measure of the light-gathering ability of the lens.

    艺术

词汇关系

名词

同义词 1

上位词 1