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.
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。
Feeding depth position stop device.
饲养深度位置停止装置。
The two types of short cracks stop propagating on reaching some depth.
两种短裂纹长大到一定深度时均停止扩展。
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