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。

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“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（William K.Aulet)建议。

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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。

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His comments reflected what other officials have said that ending the F-22 program is just one part of the effort to shift the focus of U.S.defenses away from what they see as the relatively remote possibility of a war with a major power and toward the types of smaller-scale conflicts of recent years.

VOA: standard.2009.07.21

The camera's subject tracking of moving objects in three dimensions, with full time servo AF (AF-F), ensures focus of moving objects throughout filming.

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Though Ford Motor (nyse: F - news - people ) could build a thousand Focus cars in that time, Eden will tell you that the carpentry, leather fitting and stitching involved in making a Bentley can't be rushed.

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For example, wouldn't Ford (nyse: F - news - people ) be better off fixing its Focus small car instead of spending billions of dollars buying luxury brands?

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