在光学中，尤其是录影或是摄影，景深 (depth of field,DOF) 是一个描述在空间中，可以清楚成像的距离范围。 景深就是对好焦的范围。它能通过把背景模糊化来突出拍摄对象，也可以拍出清晰的背景。
接下来你可以看到预览小样。视频中所有用红色标出的序列就是景深镜头运用的时刻。
Here you can see the preview. All the red-highlighted sequences in this video are time marks for playing with depth of field.
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 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.
你设置光圈(用于指定有多少光进入照相机镜头)——你想照一幅漂亮、浅景深或广角的照片吗？
You set the aperture, which dictates how much light comes into the camera-do you want a nice, shallow depth-of-the-field, or everything in focus?
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