Mac|Life

HOW IT WORKS

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YOU WILL LEARN

How periscope lenses could enhance iPhone photograph­y

Above: This image, by Chinese hardware firm OPPO, shows how a periscope lens works in a smartphone.

KEY FACT

To get a longer-range zoom, you need to increase focal length — the distance between the lens and camera sensor. In a normal camera, you do that by making the lens move outwards — for example, by having a telescopic lens. Telescopic cameras have been tried in smartphone­s but they weren’t too successful.

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