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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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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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。

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At one point (though it's hardly the focus of the shot) Hanks is pulling a wounded man towards what little cover there is, when he suddenly realizes that he's dragging only half a body.

CNN: From Reviewer Paul Tatara

The Kael who comes into focus in the long shot is a different sort of critic, haunted by the old classics and obsessed with the place of movies in the canon of lasting art.

NEWYORKER: What She Said

"I'm not one of the biggest servers in the game, that's for sure, but I always try to focus on the second shot after the serve, " said the 25-year-old Serb, who has won seven of the eight matches he has played against Gasquet.

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