f number in English
noun
1
the ratio of the focal length of a camera lens to the diameter of the aperture being used for a particular shot (e.g., f8 , indicating that the focal length is eight times the diameter).
The f-numbers marked on a lens are only truly accurate when the lens is focused at infinity.
Use "f number" in a sentence
Below are sample sentences containing the word "f number" from the English Dictionary. We can refer to these sentence patterns for sentences in case of finding sample sentences with the word "f number", or refer to the context using the word "f number" in the English Dictionary.
1. 12 Expanding of Field-of-view for small F-number millimeter wave focal plane imaging is analyzed in this paper.