The field of view of the sunchan camera is determined by the focal length of the lens used. Typically, sunchan cameras come with wide-angle lenses that offer a field of view ranging from 100 to 150 degrees. This wide field of view allows the camera to capture a larger area in the frame, making it ideal for surveillance and panoramic photography applications. The exact field of view may vary depending on the specific model of sunchan camera being used.