She adjusted the f-stop value before taking the portrait.
Перед съёмкой портрета она изменила диафрагменную настройку.
Definitions
f-stopnoun
A unit or setting in photography representing one step on a lens-aperture scale, where each step halves or doubles the amount of light entering the camera.
The photographer opened the lens by one f-stop to brighten the image.
f-stopadjective
Relating to the f-stop setting of a camera lens.
She adjusted the f-stop value before taking the portrait.