1.
A series of F-numbers are so chosen so that the amount of light passed by the lens when set to one number is half that passed by the lens when set to the previous numbers.Each F-number is known as a "F-stop".
当调校至某一光圈值时，穿过镜头的光量是前一光圈值的一半。每个光圈值称为一个“光圈档”。
2.
F-number: The figures marked on the lens collar to indicate the size of the lens aperture in relation to its focal length.It is the ratio of the aperture diameter to the focal length of the lens.
光圈值:刻划在镜头上用来表示镜头孔径与焦距关系的比值。经过选择的数字成一系列。
3.
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）。
4.
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）。
5.
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。
6.
When you use a small aperture (large number aperture setting) with a lens such as a zoom lens, half of the split image becomes dark. In this case, use the matte screen to focus.
当您使用变焦镜头并选用小光圈（大光圈数值）时,分裂像一半是黑的,这时可用磨砂屏对焦。
7.
If the aperture is changed while an exposure value is locked in Auto operation, the camera will adjust the shutter speed to correspond to the exposure value that is locked.
如在自动操作状态,曝光值被锁定时,又改变了光圈,相机将调整快门速度已对应被锁定的曝光值。
8.
stop-down metering
非全开﹝光圈﹞式测光
9.
Enable manual user-selected aperture and shutter speed settings for individual creative effects or difficult lighting conditions.
在光线条件很差或要求特殊的效果时,能让您手动选择光圈和快门速度值。
10.
commercial trap
有商业价值的储层圈闭
11.
Bicyclic Graphs with Extremal Kirchhoff Index;
双圈图的Kirchhoff指标极值
12.
circle of least confusion
【光】最小模糊圈，亦称
13.
elliptical iris waveguide
椭圆形光圈式波导管
14.
auto iris zoom lens
自动光圈变焦距镜头
15.
Shoot in aperture preferred mode with the lens set to wide angle and choose the smallest aperture.
在大角度镜头的光圈下，进行拍摄，光圈要最小。
16.
The Study of Largest and Smallest Order about Two Indexes on Some Kinds of Three-cycle and Four-cycle Graphs
关于某类三圈、四圈图的两种指标的最值的研究
17.
The Application of Multi-ring Absolute Encoder as a Single-ring Encoder
浅谈多圈绝对值编码器作为单圈编码器的运用
18.
A circle of light or radiance surrounding the head or body of a representation of a deity or holy person;a halo.
灵光圈或光轮象征神及圣人的人头部或身体周围环绕的光圈或彩圈；光环