你的便携式摄像机应该具有这些基本特征：自动调焦、回放及变焦镜头。
Your camcorder should have these basic features: autofocus, playback facility, zoom lens.
摄像机镜头的光圈、变焦、调焦控制速度可调，为精确调整摄像机镜头提供情报方便。
The aperture, zooming and focusing control speed of the camera can be adjusted, which provides facility for the precise adjustment of the camera lens.
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