speedlight

1.The speedlight will pre-flash that area and lock that exposure into memory.I might caution you that you have 16 seconds to then recompose and take the shot.

灯会预并把曝值记忆下来，注意你只有16秒的时间重新构图拍摄。

2.Automatic filter detection: Speedlight automatically adjusts the attached camera's white balance settings when a fluorescent or incandescent color filter is used.

（自动滤镜检测：当使用或者白炽滤镜时，灯可以自动调节相机的白平衡设置。）