アパーチャ

noun

aperture

A technical term used in optics, photography, and physics to refer to an opening that controls the amount of light passing through a lens or optical system.

• カメラのアパーチャを調ちょう整せいして、被ひ写しゃ界かい深しん度どを変かえる。

  Adjust the camera's aperture to change the depth of field.

• このレンズの最さい大だいアパーチャはF2.8です。

  The maximum aperture of this lens is f/2.8.