To further complicate focusing, night scenes rarely have enough light or contrast to perform auto focus, nor enough viewfinder brightness to manually focus.

夜景不便自动对焦，因为没有足够的光线或者鲜明的对比，而若手动对焦，取景器亮度又不够，这些使得夜间摄影的对焦更为复杂。

youdao

Speaking of sensors, we experienced problems with the auto-brightness setting, which would dim the screen too much in low light, while behaving normally in daylight.

说到传感器，我们发现一个亮度自动调节的问题，在日光下屏幕亮度自动调节正常，但在暗环境中屏幕会自动变得过于昏暗。

youdao

But it's tough to use a dim screen in bright environments, so most phones offer an auto-brightness mode that automatically adjusts the screen's brightness based on ambient light.

但是在明亮的环境下使用昏暗的屏幕是非常难受的，所以大多数手机都提供自动亮度调节模式，可以根据周围环境的亮度自动调节屏幕亮度。

youdao

You can also add a brightness toggle that lets you switch between low, medium and full, which is extremely useful considering the lack of auto-brightness mentioned earlier.

ENGADGET: LG Optimus L9 review: an affordable mid-level Android handset for T-Mobile

Auto-brightness was on, and I kept Outlook and MetroTwit running in the background.

FORBES: First Impressions: Microsoft Surface Pro

The camera's large buttons, solid, beefy camera grip and auto screen brightness further simplify operations in outdoor and underwater activities.

ENGADGET: Sony Cyber-shot H200 features 26x OIS lens, 20.1MP stills for $249 (hands-on)