The daguerreotype was a unique image that reproduced what was in front of the camera lens in minute, unselective detail and could not be duplicated.

达盖尔银版是一种独特的图像，它可以再现相机镜头前微小的、无选择性的细节，而且是不可复制的。

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It has a lens system to focus light onto the film at the back of the camera.

它的镜片系统可以将光线聚焦到相机后部的胶片上。

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The camera lens focalizer has the advantages of simple structure, convenient installation and low production cost.

该相机聚焦设备的优点是结构简单，安装方便，生产成本低。

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How many times have you found yourself at a special occasion only to realise that you have spent the majority of the day behind a lens of your camera or mobile?

BBC: Wearable tech pioneers aim to track and augment our lives

Combining the flexibility and creativity of an interchangeable lens camera with the power of the Android 4.1 platform, the Polaroid iM1836 camera makes it easy for photographers of any skill level to point, shoot, share and tag great photos instantly and effortlessly.

ENGADGET: Polaroid confirms iM1836 mirrorless with Android, adds three more cameras

In the height of the riots, Rodney King uttered a question as he looked straight into the lens of a TV camera.

FORBES: Rodney King: His Race, His Plea, His Death