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.
顶部上有一个电源按键，快门按键，镜头远近调焦键。
There's also a power button, shutter release, and zoom slider up top — all pretty standard stuff.
三井说：“iPhone 3gs只有一个不能调焦距的镜头，这让我把注意力完全放在构图和最佳拍摄时机上。”
"The iPhone has a single-focus lens with no zoom, and this simplicity keeps me devoted to only composition and the perfect photo opp," Mitsui says.
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