There are three cameras on my smatphone! Did we really need another one in our mobiles? What initially might seem to be the usual marketing trick, actually hides a logical foundation.
Although evolved, a phone is increasingly limited compared to a traditional camera. This is due to the size of the sensor but also to the quality of the stabilization and the optics. Not being able to compete with a reflex or a mirrorless, the latest generation of phones are trying to exploit their intelligence to combine all the information acquired in the shot.
As you probably understood, it is Huawei with its new P20 Pro that integrates three Leica cameras of 40, 20 and 8 megapixels respectively. The differences between the three units do not concern only the resolution but also the different information captured by each sensor.
The first, the 40 megapixels one, is what we could define the standard, the unit that deals with acquiring color images at maximum resolution; the second one, a 20-megapixel monochrome sensor, maximizes brightness and detail without the filter that in normal cameras presides over the distribution of color: the last, the 8-megapixel sensor, is behind the only lens with increased focal length, 3 times l standard optics.
Ultimately: the final shot given by the P20 Pro is the result of the work of three independent cameras that provide all the information needed to create the shot “perfect”. The perfect example is a night picture. Setting the P20 Pro in night mode, the phone will take a shot with a rather long exposure time, about 5 seconds, with a difference, however, compared to the past: artificial intelligence will compensate all the small and large movements of our hands. The result will be a brighter photo that will seem taken with the easel.