The two to four open respiratory apertures have edges that are strongly elevated above the surface of the shell.

Through the open aperture he looked out into the huge ravine below, like the hundred-yard-wide trench working of a six-lane underpass.

Out of the open aperture slashed a pinkish light that seemed to pierce everything.

In recent times the formerly open apertures have been glazed.

The thin, seesaw wail of a police siren drifted in through the open aperture.

The camera offers the convenience of image composition with wide open aperture.

It began to rotate, turning the open aperture of the airlock away from view.

A loss that zoom lenses suffer, is in wide open aperture image quality and maybe other loses, since there is no perfect lens.

The Biogon large format lens was designed to be used at a fully open aperture on 4x5 press cameras with limited degradation in image quality.

Before he could use k the door came open and Albert stood in the open aperture.