这些控制允许你轻松地调整闪光灯和相机曝光，不过主要工作仍然交由ttl系统完成。
These controls allow you to make easy adjustments to flash and overall exposure while still letting the TTL system do most of the thinking for you. Very handy indeed.
结果自动曝光控制机构迅速调整对比度和胶片影像密度，使成像结果最佳。
Results image contrast and film image density is quickly adjusted by mechanism of automatic exposure control to optimize imaging.
较不常用的功能，比如调整曝光，则可能需要小显示屏上来控制。
Less commonly used functions, such as adjusting the exposure, require interaction with onscreen controls.
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