Most compact cameras and all SLRs have a focus-lock capability, activated by pushing the shutter release button down halfway.

大部分的紧凑型相机和所有的单反相机都有一个焦点锁定功能，通过把快门按下一半儿来实现。

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Programmed auto exposure, Aperture Priority Auto and Shutter Priority Auto, Manual exposure. ; AE lock.

自动曝光，程序自动曝光P（可进行程序微调），光圈优先（A），快门优先（S），手动曝光（M）

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The first is quite a doozy -- fairly often, pressing the shutter release in record mode will simply cause the camera to lock up.

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