A large opening (small f-stop number) gives you a very shallow DOF, and a small opening (big f-stop number) gives you a much deeper DOF.
一个大洞的开启(小f值)会带给你浅度景深，而一个小的开启(大f值)则会给你一个深度景深。
To stop the tail -f command, use Ctrl + C to break the processing.
要停止tail-f命令，使用Ctrl +C来中止进程。
Camera lenses have two general attributes: f-stop and focal length.
照相机镜头有两项一般属性：f制光圈和焦距。
These tags, called EXIF metadata, specify things like the exposure and f-stop settings, gps information if your camera has it, and, of course, the time and date the photo was taken.
这些标记称为EXIF元数据，是为了说明照片的曝光度和光圈设定，有的相机还会显示GPS信息，当然，还有拍照的时间和日期。
The f-stop, otherwise known as the aperture, determines your depth of field (the area in focus) and how much light can pass through the lens to reach the sensor.
f制光圈(或称光圈)决定相机的景深(对焦区域)以及有多少光能通过镜头到达传感器。
Single chip processor F-V interface unit is a unit of converting the output signal of speed transducer for 6k locomotive into input signal demanded by domestic ZTL-3 automatic train stop apparatus.
单片机f - V接口装置是用于将6K机车速度传感器输出信号转换为适合于国产ZTL - 3型自动停车装置输入要求的装置。
I wanted ambient light to register, and I set the f-stop and shutter speed to where I could see from my camera's built-in meter that I would get ambient light to register.
我想要环境光曝光正确，因此我选择了相应的光圈和快门速度，并且通过观察相机的机内测光确保我的设置是正确的。
This exposure is made with a small F-stop to a sheet of white paper placed over the original, or to the rays from a flash - lamp.
闪光曝光，可用小光圈档，用一张白纸放在原稿上面或用闪光灯曝光。
It's the one-stop destination for lifestyle advice for today's discerning gent, packed with useful stories on fashion, food, football and other good stuff beginning with f.
今天的一站式目的地生活方式建议的绅士，挤满了有用的故事的方式，食品、足球和其他好东西开始F。
The f-stop values mentioned above are fairly standard among lenses;
上述的f值是一般标准镜头的常用值；
Remember, going up an f-stop cuts the amount of light by half.
记住，调高f值是减少光线量的一半。
This difference is due to our camera Settings. I used a much slower shutter speed, and a slightly wider f-stop. With this, I allowed nearly 3 stops MORE ambient light in. And it shows.
两张照片的不同在于拍摄时设置的不同，我使用的更低的快门速度和更大的光圈，因此我几乎增加了3级的环境光的曝光，因此我的照片看起来更好一些。
Yes, you can control the range of focus from any given subject distance, but just controlling the f-stop won't usually turn a crystal-sharp background into a dreamy-soft background.
是的，你可以控制任何距离特定主题的范围从重点，只是控制光圈通常不会把一个梦幻般的柔软背景的水晶般锋利的背景成。
Even at the initial f-stop of 3.8, contrast and detail rendering are already excellent.
即使在最初的F - 380，对比度和细节渲染已经停止出色。
Even at the initial f-stop of 3.8, contrast and detail rendering are already excellent.
即使在最初的F - 380，对比度和细节渲染已经停止出色。
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