Traditional Culture Encyclopedia - Photography major - Why are the aperture coefficient markings on photographic lenses arranged in a square root 2x series?
Why are the aperture coefficient markings on photographic lenses arranged in a square root 2x series?
The f value is equal to the focal length/the diameter of the entrance pupil. That is to say, every time the diameter of the entrance pupil increases by about 2 times, the cross-sectional area of ??the incident light increases by about 2 times, and the f value shrinks by 2 times. 2 times,. The amount of incident light is increased by approximately 2 times. The so-called "full aperture" refers to twice the amount of light passing through.
- Related articles
- Is the ordinary family suitable for the art test? Is an ordinary family worth taking?
- The photo of the baby100th day was taken on100th day?
- What are the majors of art test?
- Is the video taken by ct a video?
- Beautiful drunk! Xingning night scene bursts into a circle of friends! Zhang is used as wallpaper!
- Zhou Tao: For the second time, I married Lu Yun, a wealthy businessman who is 8 years older than me. My daughter was gifted and became the ice goddess at the age of 54.
- What scenery do the birds in the valley Woods paint?
- What exactly does a wedding photography shop do?
- Single recruitment of 10 majors
- At the Weibo, 46-year-old Xu publicly expressed his feelings of loving someone.