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。
The left side was shot at f/22: The torch is in focus, and you can make out the tree and the house behind it. That's a large DOF.
仔细观察一下这张有一盏落地式火炬灯的照片，左侧是在f/22的光圈拍摄的：火炬灯为焦点，你可以看出背景中的树木和房屋，这就是我们说的大景深。
“And keep the F-word in mind — focus, ” advised William K. Aulet, managing director of the Massachusetts Institute of Technology’s Entrepreneurship Center.
“时刻谨记聚焦”，麻省理工学院创业中心的主任威廉 k.欧雷（WilliamK.Aulet)建议。
The right side, on the other hand, was shot at f/2.8: The torch is in focus, but the trees and the house are melted beyond recognition.
右侧是在f/2.8的光圈拍摄的：火炬灯为焦点，但是背后的房屋和树已经模糊得难以辨认了，这就是浅景深。
Our focus on delivering high-quality F# core tools is designed to augment Visual Studio’s amazing strengths as a presentation-rich object-oriented programming environment.
我们所关注的是，发布一个高质量的F#核心工具，可以增强VisualStudio的实力，让其成为一个具有丰富界面开发能力的面向对象的编程环境。
Portrait mode chooses a large aperture (a small 'f' number) which will make the depth of field (the amount of your shot in focus) smaller.
人像模式用一个大光圈(f值小)，而让景深(清晰对焦的那部分)变小。
Take a boring photo with your 50mm f/1.8 prime wide open, with a small sliver of your subject in focus.
用你的50mmf/1.8定焦头，光圈开最大拍一张特无聊的照片，让你拍的东西只有一丁点在焦距上。
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。
The Pentax ME-F, which used focus sensors in the camera body coupled with a motorized lens, became the first autofocus 35 mm SLR in 1981.
宾得我，男，该传感器用于集中在机身加上机动镜头，成为第一个自动对焦35毫米单镜反光相机于1981年。
The F-35 cockpit is designed to ensure that the pilot can focus on getting the job done without having to worry too much about other tasks.
F - 35的座舱设计成确保飞行员能够关注于完成任务而不用操心其它事项。
The focus is placed on the controlling of the time interval of the two pulses which are send to stepping-motor drivers and the calculation f the output - number for bits on the I/O card.
文中重点讨论了此类软数控系统中脉冲时间间隔的控制问题以及端口脉冲发送的计算方法和技巧。
The focus is placed on the controlling of the time interval of the two pulses which are send to stepping-motor drivers and the calculation f the output - number for bits on the I/O card.
文中重点讨论了此类软数控系统中脉冲时间间隔的控制问题以及端口脉冲发送的计算方法和技巧。
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