The camera still shoots at 720p with a fixed optical zoom (but 2X digital) lens and attaches directly through its own USB connector.
VadoHD的视频规格依然只有720p，并且没有光学变焦功能，只支持两倍数字变焦，设备通过USB接口与外界连接。
Digital cameras generally offer 2x or 3x optical zoom, and digital zoom kicks in after you bump into to the limit of the optical zoom capability.
数码相机一般提供2倍或3倍的光学变焦，而且数字变焦是在光学变焦能力到达极限之后才立即起作用的。
Digital cameras generally offer 2x or 3x optical zoom, and digital zoom kicks in after you bump into to the limit of the optical zoom capability.
数码相机一般提供2倍或3倍的光学变焦，而且数字变焦是在光学变焦能力到达极限之后才立即起作用的。
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