1.
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）。
2.
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）。
3.
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。
4.
For underexposed pictures, set a large aperture (smaller number aperture setting) or slower shutter speed. For overexposed pictures, set a smaller aperture (large number aperture setting) or faster shutter speed.
对于曝光不足的景物,可适当增加光圈（较小的光圈数）或选用较慢的快门速度。
5.
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。
6.
guide number =GN
门灯指数，以距离计算出光圈
7.
The number of turns of wire in the secondary coil is the same as the number of turns in the primary.
次级线圈的圈数和初线线圈圈数一样。
8.
stop-down metering
非全开﹝光圈﹞式测光
9.
Design MRI Cylindrical Gradient Coil using Stream Function with High-order Smoothness
利用高阶光滑流线函数法设计MRI柱面梯度场线圈
10.
A usually adjustable opening in an optical instrument, such as a camera or a telescope, that limits the amount of light passing through a lens or onto a mirror.
光圈光学仪器上的一个可调开口，如照相机或望远镜，它控制穿过镜头的或到镜面的光的数量
11.
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”。
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.
aerial survey lens
空中测量镜头，应用于在空中测量地面，取景角度达120度，光圈多数固定
17.
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。
18.
CNC race grinding machine for ball bearing outer ring
数控轴承外圈沟磨床