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。
To further complicate focusing, night scenes rarely have enough light or contrast to perform auto focus, nor enough viewfinder brightness to manually focus.
水下摄影带给人的愉悦和兴奋是由心而发，毕竟不是所有人都能掌握手动设定。
Underwater photography is inherently fun and exciting enough that dealing with manual settings is not for everyone.
通过这样做，不仅可以手动介绍一些颜色不是在图片前，它还有助于失去摄影外观纹理。
By doing so, not only can you manually introduce some colours that weren't in the picture before, it also helps to lose the photographic look of the textures.
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