You get the same amount of light with a large aperture and a fast shutter speed as you do with a small aperture and a slow shutter speed.

你使用大光圈以及慢速快门所得到的光和你使用小光圈以及高速快门得到的光是一样多的。

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Under those conditions photographers shoot with a fast exposure time and small aperture. That makes it impossible to capture faint objects in a dark background, such as stars.

在这种情况下拍摄者会使用很短的快门时间并调小光圈，这样就不可能拍摄到黑色背景上那些很暗的物体，如星星。

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Even if you intend to expose using a small aperture, a lens with a large maximum aperture can greatly increase viewfinder brightness.

即便你打算使用小光圈照相，带有最大光圈的镜头也可以在取景时大大增加取景器亮度。

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Global Hawk can pick out objects as small as a truck with its synthetic aperture radar, which uses the plane's flight path to simulate the curve of a radar dish several hundred meters long.

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