aperture size 光圈大小
depth of field 景深
camera settings 相机设置
exposure value 曝光值
1. A lower f-number creates a shallower depth of field.
较低的f值会产生较浅的景深。
2. You should adjust the f-number to control the light.
你应该调整f值来控制光量。
A: What is the f-number for this shot?
A：这张照片的f值是多少？
B: I used an f-number of 2.8 to get a blurred background.
B：我用了f/2.8来获得模糊的背景。
1) 摄影中控制光圈大小的参数
2) 决定照片背景虚化程度的数值
1. 摄影中的光圈值
e.g.
The photographer adjusted the f-number to increase the exposure.
摄影师调整了f值以增加曝光。
noun
1. The ratio of the focal length of a lens to the diameter of its aperture.
Synonym: f-stop