Some people need to be more covert and flexible scanning can use button lens.

有的人需要更隐蔽和灵活的扫描就可以运用纽扣镜头。

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A push button extends into the end ring and has a lens cap.

一个按钮伸进该端环，并具有一个透镜盖。

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A push button extends into the end ring and has a lens cap.

一个按钮伸进该端环，并具有一个透镜盖。

youdao