So you have these two parameters, shutter speed and aperture size, both of which do essentially the same thing: control how much light gets in.
现在你已经了解了这两个参数——快门速度和光圈大小,他们从本质上来说有同一个功能:控制进入相机的光线总量。
The size of the aperture not only affects how much light reaches the sensor, but also how much of the image is in focus.
光圈的大小不仅影响感光程度,同时还影响在对焦范围的大小。
Each number does not necessarily correspond to a specific size of the aperture opening, but is a relative number.
每组数字并非是光圈打开大小的特定值,只是一个程度的相关体现。
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