discrete field-stop aperture 分立场阑孔径 ; 分立视场光栏孔径
aperture stop 孔径光栏 ; 孔径光阑
discrete field stop aperture 分立场阑孔径
aperture stop size 光阑尺寸
aperture-stop 孔径光阑
aperture stop number 光圈档数
variable aperture stop 可变孔径光阑
Usually one can first meter using a larger aperture (so that the metered exposure time is under 30 seconds), then stop down as necessary and multiply the exposure time accordingly.
通常，你可以用大点的光圈测光(这样，测量的曝光时间就在30秒以内)，随后缩小光圈，相应地增加曝光时间。
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。
Each aperture size (referred to as a stop) is marked with a corresponding number that represents half the light of the previous stop.
每一档数字都是比前档减少一半的通孔大小。
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