Lately there has been a huge approach of dual-camera smartphones! And the dual camera has become one of the most desirable ones thanks to the wonderful photography experience it offers! However, do you know how it works in producing a picture? Let’s take a look at the article below to know more!

Dual-camera smartphone: How does it work in producing an image?

First of all, let’s talk about the function of each camera in the dual-camera smartphones! Between the two cameras on the back, one camera is for capturing the subject with standard contrast detection autofocus. The other camera is in charge of capturing the light in all directions, hence viewing the objects at different depths and angles. With this dual-camera setup, the photo taken is a combination of one photo with various contrast level and one photo with different depths (layers).

The purpose of this dual-camera setup is to shoot and focus later! Before the final photo is produced, users are allowed to adjust the focus and the viewing angle of the draft photo (which is made of two separate photos). All you need to do is to tap on the subject (or area) you wanna bring into focus and then the layer containing that subject will be the main focus of the photo. You can watch the video at the end of this article to have better imagination about how dual-camera smartphones work!

However, this technology is actually not autofocus. Instead, it is still contrast detection autofocus. That means it has to rely on the light condition of the surrounding. The more light in the frame, the better the photo is. And at the same time, the darker the scene is, the worse the dual camera performs. This is the only drawback of dual-camera smartphones.

Dual-camera smartphones: Are they worth the money!

In my opinion, the answer is NO. The only thing that dual-camera smartphones are different from other autofocus technology is the ability to shoot first and focus later! Compared to other autofocus technology, this one is still poor in terms of speed and accuracy, not to mention that such phones are very expensive!