F-number of camera lenses

  • Thread starter Gear300
  • Start date
  • #1
1,179
5
I was reading on the f-number of lenses for cameras...somewhere in the text, they stated that the area of the image is proportional to q2, in which q is image distance. I figured the area to be proportional to q, but I don't really see it as q2...so how does this work out?
 

Answers and Replies

  • #2
Andy Resnick
Science Advisor
Education Advisor
Insights Author
7,510
2,081
The f/# doesn't affect the field of view, so I'm not sure what you mean, exactly. The image *brightness* goes as the square of the f/#, but that's different.
 

Related Threads on F-number of camera lenses

  • Last Post
Replies
1
Views
2K
Replies
22
Views
2K
Replies
32
Views
9K
Replies
3
Views
1K
  • Last Post
Replies
5
Views
4K
  • Last Post
Replies
2
Views
496
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
1
Views
5K
Replies
3
Views
786
Top