Usually you can lock the focus in three steps.

通常可用三个步骤锁定焦点。

youdao

If your subject is not in the center of the picture, you need to lock the focus to create a sharp picture.

假若你的拍摄对象不是在照片中央，你就需要锁定焦点已获得清晰的相片。

youdao

Nbsp; If your subject is not in the center of the picture, you need to lock the focus to create a sharp picture.

假若你的拍摄对象不是在照片中央，你就需要锁定焦点已获得清晰的相片。

youdao

The 1080p HD video camera automatically removes jitters and lets you lock the focus on a moving object.

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Also the camera's hi-speed auto focus can lock onto subject in as little as 0.1 seconds, letting users grab the most fleeting photo moments with ease.

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The D3100 camera also uses Face Detection technology to lock focus on up to 35 human faces, a feat not even accomplished with consumer camcorders.

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