The field of view range of wide-angle USB camera modules varies significantly due to different designs. Common types and their field of view ranges are as follows:
Ordinary wide-angle lens: The focal length of the lens is generally between 2.8 and 4mm, and the field of view is usually between 79° and 102°. This type of lens is suitable for application scenarios that require a wide field of view but not an extremely wide Angle, such as general indoor surveillance or video conferencing.
Wide-angle lens: The focal length of the lens is between 2 and 3mm, and the field of view can reach 120° or even higher. This type of lens can offer a wider field of view, but the edge images may have some distortion, and distortion correction technology is needed to optimize the image quality.
Fisheye lens: The field of view can reach 180° or even higher. This type of lens can provide a panoramic view, but the image will have severe distortion. Usually, specialized software is needed to correct the distortion before it can be used for normal image recognition and monitoring.