Ten years ago, a single camera in a phone was perceived as a serious breakthrough. Today, even budget models have at least three lenses, and flagships in general resemble devices with several “eyes”. We are used to this design, but the logical question has not disappeared: why does a smartphone, which should remain compact, need so many cameras?
The answer lies not only in marketing, but also in physics. A smartphone cannot compare with a full-fledged camera: its body is thin, the sensor is small, and the optics are limited. Therefore, instead of one universal camera, manufacturers are forced to use several specialised modules. This is more of an engineering compromise than a demonstration of technological luxury.
It is technically difficult to create a “perfect” universal camera. Different shooting scenarios require different focal lengths: for landscapes – wide angle, for portraits – separate optics, for zoom – telephoto. Add to this the limitations of sensor size and body thickness, and it’s clear why one module can’t fulfil all roles. Therefore, the duties are distributed: the main camera is responsible for everyday photos, ultra-wide – for large-scale scenes, telephoto – for optical zoom, and additional sensors help with macro or depth detection.
Especially noticeable is the usefulness of multi-camera in portrait and night photography. The smartphone essentially imitates the principle of human vision: different modules collect different data, and the processor forms a depth map and processes the scene. The effect of blurred backgrounds or detailed night shots is the result of complex algorithms, not just glass and sensor work. Cameras are becoming sources of information for computing.
At the same time, the industry is gradually moving from more modules to software processing. Modern algorithms are already capable of creating portraits without a separate depth sensor and improving night photos without complex optics. Perhaps in time smartphones will again get fewer “eyes”, but compensate for this with more powerful computing.
For now, multi-camera models are a logical step in the evolution of mobile photography. Five lenses in the body is not an indicator of luxury, but a compromise between the laws of optics, the size of the device and user expectations. And marketing just presents this engineering necessity in an attractive wrapper.