Why does vivo mobile video automatically zoom?

Vivo mobile phone video automatic zoom is because the mobile phone supports phase detection autofocus PDAF function. During the recording process, the camera will automatically focus according to the distance of the shooting scene. When the distance changes, the camera will complete the whole focusing process again, and the picture will become clear from blur, which is a normal phenomenon of the camera.

Automatic zoom characteristics of video recording in vivo mobile phone

Auto-focus is a function set on the camera, which automatically focuses the subject through electronic and mechanical devices to make the image clear. The main features of autofocus are high focusing accuracy and convenient operation, especially focusing on the subject. In addition, the manual focusing operation during shooting can be omitted.

Therefore, it is also beneficial for photographers to pay more attention to the photos they take and concentrate on capturing the instantaneous scene of the subject. Auto focus can be divided into active auto focus and passive auto focus. Active autofocus mainly measures the distance of the subject by emitting infrared rays or ultrasonic waves, and the autofocus system drives the lens to adjust the image distance according to the obtained distance data, thus completing autofocus.