optical zoom on 光学放大
extra optical zoom 超级光学变焦
Optical zoom lens 光学变倍镜头
optical zoom ratio 光学变焦比率
Optical zoom in 光学放大
Optical zoom rate 光学变焦比
optical zoom system 光学变焦系统
Such As Optical Zoom 如光学变焦
Also, concentrate on optical zoom, not digital zoom, which degrades image quality.
另外还要注意光学变焦，而不是数码变焦，数码变焦会降低画面质量。
As for buttons, there is a shutter release, a slider for an 8x optical zoom and a power button.
机身按钮包括一个快门键、一个8倍光学变焦滑钮和一个电源键。
The Pentax Optio NB1000 is a 14.1 megapixel camera with 4x optical Zoom and 720p video recording.
宾得Optio NB 1000相机配备1400万像素摄像头，4倍光学变焦，具备720p视频拍摄能力。
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