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快门优先自动曝光方式和光圈优先自动曝光方式是自动曝光的两种杰出的模式，它给使用者带来了操作上的极大方便和快捷而极准确地曝光功能。尽管这两种AE自动曝光模式面市至今已经二十年有余了，但是在135单反相机自动化程度日新月异的今天，这两种自动曝光模式仍然被保留下来，
Shutter-priority AE and Aperture-priority AE are two outstanding modes of AE that give the operator maximum operational convenience and quick and accurate exposure. Although the two AE AE modes are available for more than two decades, the two AE modes are still retained today with the ever-changing 135 SLR cameras,