One voice came clearly to them down the narrow aperture.

Deep Focus - the camera chooses a narrow aperture in order to get more depth of field.

He made a narrow aperture between his fingers, striving to make out the details of the scene below.

Suddenly he leaped to his feet and jumped through the narrow aperture.

I listened for a long time before proceeding down the hall and into the narrow aperture below the stairs.

There is only one narrow aperture, just big enough for the male to transfer food to the mother and the chicks.

Then, suddenly, a narrow aperture opened into which the current pulled them.

He looked over his shoulder, then caught the door before she opened it fully and slid through the narrow aperture.

Then he forced his body through the narrow aperture.

Then he turned to help Mur through a narrow aperture into yet another access alley.