实际上，当你按下快门时，一套复杂的程序开启，包括镜头内光圈的设置、一块单镜头反射镜的升起和其他更多的步骤。
When you press the shutter release on the camera, a complex sequence of events occurs, including setting the aperture in the lens, flipping up the mirror of an SLR and a lot more.
聚光镜装配有瞳孔膜，那是一个有贡杆控制的快门，用来调节进入镜头系统的光量。
The condenser is equipped with an iris diaphragm, a shutter controlled by a lever which is used to regulate the amount of light entering the lens system.
由于其镜间快门具有1/1000秒的速度，它也是同等种类中速度最快的相机。
With its central shutter and a shutter speed of only 1/1000 second, it is also the fastest camera in its class.
由于其镜间快门具有1/1000秒的速度，它也是同等种类中速度最快的相机。
With its central shutter and a shutter speed of only 1/1000 second, it is also the fastest camera in its class.
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