How many degrees is the wide angle of mobile phone 0.5?

0.5x in the camera means wide angle, 13mm lens, 120-degree viewing angle.

Explanation and analysis: In optics, optical lenses are divided into small field of view lenses, ordinary lenses (about 50 degrees), wide-angle lenses and super wide-angle lenses (100-120 degrees) according to the size of the field of view.

The wide-angle lens has an angle of view of more than 90 degrees, which is suitable for shooting close-up and large-scale scenes. It can also deliberately exaggerate the foreground to create a strong sense of distance, that is, perspective. A typical wide-angle lens for a 35mm camera has a focal length of 28mm and a viewing angle of 72 degrees. The 50, 40mm lens of the 120 camera is equivalent to the 35, 28mm lens of the 35mm camera.

Wide-angle function

A wide-angle lens is a photography lens with a focal length shorter than a standard lens, a wider angle of view than a standard lens, a longer distance than a fisheye lens, and a smaller angle of view than a fisheye lens. Wide-angle lenses are divided into two types: ordinary wide-angle lenses and ultra-wide-angle lenses.

The focal length of the ordinary wide-angle lens of the 135 camera is generally 38-24 mm, and the viewing angle is 60-84 degrees; the focal length of the ultra-wide-angle lens is 20-13 mm, and the viewing angle is 94-118 degrees. Because the wide-angle lens has a short focal length and a wide viewing angle, it can capture a larger area of ??scenery within a shorter shooting distance.