Assertion: focal ratio | /r/HasProperty | f-stop
Facets:
Source sentences:
text: Hence F-number (F-stop) depends on two variables; that are diameter of aperture and focal length of the lens.
text: F-numbers (F-stops) have been evolved to allow a definite/fixed amount of light in to the camera (As far as I known).
text: For lower F-number (F-stop) the aperture would be bigger allowing more light and for higher Hence F-number (F-stop) the aperture would be smaller allowing less light in to the camera.