The auto focus and touch focus on phone's camera

BySophia Windsor 2018-06-28 12141

Focusing is a key step when we take photos via our smartphones, as it can make photos clearer and produce the result that we want. There are two main focus type on our mobile phone - auto focus and touch focus. What’s the difference between them? Let’s know more details below.


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Auto focus

Auto focus is the ability of a camera / lens system to automatically adjust the focus of the lens via a motor attached to the focus group of the lens. It is a feature of digital cameras that allows them to focus correctly on a subject. It enhances the quality of the photo over fixed-focus cameras and allows for close-up (or the even closer macro shots).

the auto focus on smartphone camera

Phones use passive auto-focus with contrast measurement. This means that the camera needs contrast to focus and have problems focusing on a blank wall or in low light conditions. Some phones can use their camera LEDs as a focus assist light to help deal with the latter case.


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Touch focus

Touch focus just uses your touch to choose the area of contrast on which to base focus. The auto mode just decides that for itself. There's nothing physically different with the actual focus process.

the touch focus on smartphone camera

In touch focus devices, the user can select which part of the image the camera should focus on by touching the corresponding object in the viewfinder. Touch focus is available only in cameras with a touch screen.


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