如果您使用的是自动对焦相机，您需要先锁定焦点，这是因为大多数相机将焦点对准取景器中心的物体。
You'll need to lock the focus if you have an auto-focus camera because most of them focus on whatever is in the center of the viewfinder. Try it yourself.
你可以尝试对焦在与中心物体距离相近的任何一个光源上。
One can try focusing on point light sources at a similar distance to the subject of interest.
中心对焦对许多相机而言更为精确敏感，所以最好使用中心对焦而不是外部对焦——即便对焦后需要重新调整稳定。
The central focus point is more accurate/sensitive in many cameras, and so it is best to use this (instead of the outer focus points) — even if using it requires having to recompose afterwards.
标准自动对焦时，相机自动中心聚焦，所以旁边的物体不能对焦。 相机自动检测物体并将对焦框置于最佳位置。
With standard AF, the camera focuses automatically on the center so the subjects on either side are out of focus. ar02. gif EXILIM detects subjects and positions focus frames in the optimum locations.
标准自动对焦时，相机自动中心聚焦，所以旁边的物体不能对焦。 相机自动检测物体并将对焦框置于最佳位置。
With standard AF, the camera focuses automatically on the center so the subjects on either side are out of focus. ar02. gif EXILIM detects subjects and positions focus frames in the optimum locations.
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