What are Dual Cameras in Smartphones | How Do They work | Technology Behind It & Types of Dual Cameras Used.

Introduction -  Dual cameras in Smartphones are generally referred to the use of two (2) cameras in the front or rear or both sides of a Smartphone which basically provides extra functionalities or features such as more clarity, Bokeh Effects, Wide angle shots etc., than the Smartphones that are having single camera's. 

There are mainly 4 Types of Dual Cameras that are used by Smartphone Manufacturers nowadays.
They are -
1. The Depth Sensor Camera System
2. The Wide-Angle Camera System
3. The Telephoto Camera System
4. The Monochrome Camera System.

Let's know them better in details.

1. The Depth Sensor Camera System - In this system, the primary camera is accompanied by a second camera whose only function is to 3D map the area in front of the camera.
The second camera differentiates how far the objects in front of it are with respect to each other. This information is then used to separate the foreground subject from the background. These are mainly used in Honor 7x, Lenovo K8 Plus, Honor 9 Lite.

2. Wide Angle Camera System - As the name suggests, Wide Angle Camera helps to take a wider view of the picture that is taken using it.
The secondary camera produces a wide field of view that allowed the user to capture a much wider area without moving backwards and thus helps to take Wide Angle shots using Smartphones.

3. The Telephoto Camera System - These cameras help to actually lets you zoom into your subject to get 2x lossless optical zoom. In this system of cameras, the secondary lens has twice the focal length of the primary lens, giving you an instant 2x optical zoom. These are mainly used in iPhone's.

4. The Monochrome Camera System -  In this type of camera system the primary camera is accompanied by a nearly identical secondary camera. Both the primary and secondary cameras usually have identical sensors, apertures, lenses and focusing systems. The main difference between the two is that RGB color filter is absent in the secondary camera.

These are the basics of some commonly used Dual Camera systems in Smartphones. The implementation of such cameras are entirely dependent on the basic purpose for which the smartphone cameras are to be used whether for Optical Zoom, or DSLR like Bokeh Effects or Wide angle shots.

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