What is the angle of view of the camera lens?

Angle of view is the viewing range. There are horizontal and vertical angles. The viewing angle is related to the focal length and imaging area. The corresponding relationship between focal length and viewing angle of photographic lens is: lens focal length10mm10mm 25mm 75mm10mm150mm viewing angle 98 65 45 23 14 12 8 binocular viewing angle 65438. The angle of view determines two factors: the focal length of the lens and the imaging area. The above data is the corresponding relationship between the viewing angle and focal length of a camera with a diagonal of 2/3 inch imaging area. Lens focal length10mm16mm 25mm 50mm 75mm100mm150mm viewing angle 98 65 45 231412 8 human binocular viewing angle. The angle of view determines two factors: the focal length of the lens and the imaging area. The above data is the corresponding relationship between the viewing angle and focal length of a camera with a diagonal of 2/3 inch imaging area. With the same object distance, the longer the focal length, the smaller the scene and the larger the image.