What is the telephoto of your phone doing?



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The days when your phone had only one camera on it disappeared. Nowadays, it is common to have several on the back of a device or, if you are Nokia, many, many more.

The thing is … why? What are they all here for? What are they doing?

Well, we are here to answer that question. We've already looked at a time-of-flight camera, but today we're thinking about something else that's commonly found on the back of your phone: a telephoto lens.

So, pray, what's a telephoto lens?

Today, modern phone photography relies on the use of several different types of lenses, and then on combining these shots with software to get the final image that you see on your screen. The role played by a telephoto lens in this process is distance.

Basically, this means that the telephoto lens helps take pictures of things further away, without resorting to a digital trick to provide a zoom. The more the lens is equipped with optical zoom, the higher the quality of the pictures taken at a distance.

Currently, the telephoto lens of the Huawei P30 has the largest amount of optical zoom on a phone (5x), which is significantly more than the 2x zoom iPhone XS and Galaxy S10.

Telephoto telephones are an essential part of this blurry background, the bokeh effect you see in today's "portrait" shots. Of course, it does not do it entirely by itself (a ToF camera is also an important part of the production of these images), and software can do a lot of work, but a telephoto lens is useful.

So you have a brief description of why you have a telephoto lens on the back of your camera. Something that can basically be summed up with the word Zoom. Stay tuned for more details on phone photography.

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Posted on August 25, 2019 – 15:01 UTC

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