光圈的英文：
aperture
diaphragm

iris diaphragm
虹彩器,虹彩隔片,锁光圈,可变光阑,(波导中的)的膜片

What aperture are you using?
你使用多大的光圈

Set to the desired lens aperture.
设置所需的镜头光圈。

Check the shutter speed dial and aperture ring to make sure you have the correct exposure.
检查快门速度及光圈以确保正确的曝光量。

Check the shutter dial and aperture ring to make sure you have the correct exposure.
检查快门速度光圈以确保正确的曝光量。

The aperture will be set to the aperture opening you have selected and you can confirm the areas that are focused.
光圈将被调整到你已选择的光圈大小。你可以核准对焦区域。

Iris diaphragm: The adjustable hole in a camera to control the amount of light passing through the lens. See Diaphragm.
虹彩光圈:相机上可供调校的孔，它控制穿过镜头的光量。参阅光圈。

Use a flash unit, the Bulb function, or simply select a larger aperture (smaller number aperture setting) as necessary.
这时必须使用闪光灯或B门拍摄,或简单地加大光圈(选用较小的光圈数值)。

Set the lens aperture to the aperture value designated by the flash unit according to the ISO setting of your camera.
根据您相机的ISO设置并按闪光灯要求的光圈数值来选好您相机的光圈大小。

Use a neutral-density filter or simply select a smaller aperture (larger number aperture setting) as necessary.
这时必须采用自然密度的滤光片或简单地减小光圈(选用较大的光圈数值)。

The aperture will be set to the aperture opening you have selected and you can confirm the areas that are focused.
光圈将被调整到你已选择的光圈大小。你可以核准对焦区域。

Either of the margins of the aperture of a gastropod shell.
腹足纲软体动物缺口的两个边缘中的任一个

To peer through a small aperture or from behind something.
偷窥透过细缝或从某物后面偷偷地看

If the aperture is set to
如果光圈要调到“P”或 “A”,请按住“P”或 “A”锁定拴同时转动光圈环。

Set the lens aperture to the aperture value designated by the flash unit according to the ISO setting your camera.
按照您相机上闪光装置ISO设置,设置好镜头的光圈大小。