sensor aperture opening ratio 传感器开口率
foaming agent for opening aperture 开孔发泡剂
It works by separating the mirror flip and aperture opening into two steps.
它将镜面翻转和光圈打开分为两个步骤。
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。
This is because you halved the amount of light being let through the aperture opening, but let in twice as much light by keeping the shutter open longer.
这是因为前一组你用了一半的光圈，而后一组用了一半的快门时间。
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