focusing ring

Laser conjugation direting sensor based on differential focusing;

一种基于差动调焦的激光共轭引导传感器

Simulative experimental instrument based on central split-image focusing;

中心裂像调焦模拟实验仪

Aim\ To realize automatic height measurement and focusing of aerial photographic camera.

目的　实现航空像机摄影高度自动测量和调焦 。

Turn the focus ring until the double image become a single image.

旋转对焦圈直至叠影变清晰为止。

focus-coil assembly

电磁聚焦组件;聚焦线圈系统;聚焦线圈系统

deflecting focusing coil for camera tube

摄像管偏转聚焦线圈

multicoil focused induction too

多线圈聚焦感应测井仪

auto iris zoom lens

自动光圈变焦距镜头

overall f - number

总光圈大小, 总孔径焦距比

While looking through the viewfinder, focus by turning the focusing ring.

观察取景器同时转动光圈环进行对焦。

Care must be taken to protect the focusing coils from stray magnetic fields.

必须小心，以防止聚焦线圈产生寄生磁

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。

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。

I've already set the lighting and distance. You can just press this button.

我已经调好光圈焦距，只要这个按钮就行了。

The camera adjusts its focus, lens aperture, and shutter speed by itself.

照相机会自己调整焦距、光圈和光闸速度。

Ini o circumstances can the bicycle in the circlel of the circus be a focus.

马戏表演圈子中的自行车决不会成为焦点.

Computing Method for Main and Auxiliary Focus Coil Ampere Winding of Electron Gun

电子枪主辅聚焦线圈安匝数的计算方法

Simulate and Analysis the Performance of the Adjust Focus Voice-coil Actuator in Measuring Ptical Path

测量光路中调焦音圈电机特性的仿真分析

MECHANISM AND SOLUTION OF RING-FORMING OF PETROLEUM COKE IN A 50m ROTARY KILN

浅谈50m回转窑内石油焦结圈机理及解决方法

Arcing at the tower will carbonize the cable boot, which if it is connected to a new ignition coil, will cause the coil to fail.

椿上的电弧会使线圈的根部烧焦，如果它被连接至新的点火线圈，将会损坏线圈。

least circle of confusion = circle of least confusion,

【光】最小模糊圈﹝以一点光在聚焦位置，产生影像的直径来计算景深﹞