Why New Smartphones Have Dual Cameras?

A growing number of newer smartphones receive dual cameras. If you are not familiar with this type of technology, you probably want to know more about it.

Let’s start with the obvious question: what is a dual camera? In general, this means that instead of one sensor your smartphone has two. Smartphones with this type of technology have two different photo sensors that work in a complementary way. The smartphone’s main sensor acts more or less like an ordinary camera. It captures color images in the best possible way and the second sensor is intended to add elements that can not be captured by the first sensor, especially in terms of field depth.

The combination of the two images, which is performed electronically by the camera application, gives an optimal result. Each smartphone manufacturer has its own strategy on how to take advantage of the dual camera feature to increase the smartphone’s photographic potential.

Improved Special Effects

1. Almost 3D Images

One of the advantages of a dual camera is obviously the amount of perspective. Thanks to the second lens, the distances are better analyzed and we can get an almost 3D looking image.

2. Augmented Reality

Lenovo Phab 2 Pro and Asus Zenfone AR have another concept: in addition to the traditional RGB camera, there are fish-eye lenses and a camera called the “time-of-flight” (ToF). Indeed, this is a 3-in-1 camera. The idea is simple: thanks to the infrared laser that is plugged into the camera, the light is reflected. Field depth is calculated electronically in such a way that it can be captured with RBG sensors. Those measurements and calculations allow the software to create a 3D model of everything captured by the camera. This way the phone can overlay other objects over the camera’s picture in real time, like a little animated puppy running around the room or real size football player playing with a ball.

Improved Photographic Potential

1. More Detailed Photos

Huawei P9, Mate 9 and Honor 8 have a different strategy. Their second sensor does not capture color (the image is visible only in black and white) but is able to capture more details than the main color camera. Color is added to the final image using a specialized software. This type of technology allows you to get more detailed photos.

2. Detailed photos  in poor lighting conditions

Lighting control is essential for photography and a nightmare for every photographer because there are no ideal lighting conditions. While in the professional world one can deceive and achieve the necessary conditions for lighting, the photographer-lover will experience serious problems at night or if the lighting conditions are too bad.

Fortunately, this second lens helps to solve this problem. It captures all the details and lights are added afterward. Generally, the resulting image is not always ideal, but it’s better than what you get with just one sensor.

3. Zoom with minimal loss of quality

Some devices, such as the iPhone 7 Plus, are optimized to offer an excellent zoom feature that is better than the digital zoom found on most smartphones. The LG G5 is also different, one of the sensors has a wide angle, meaning that it can cover a much wider range. This feature makes it ideal for landscape photography while the iPhone 7 will be more suitable for portraits. In other words, this wide angle adds another dimension to the image by placing the main image in the background by activating the zoom function.


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