Tesoo 4mm lens angle of view not only extends the focal length of a camera but also amplifies its angle of field. The sensor size of the 4mm lens is 1/1.8'' to 1/3''. TTL: 8.47-38.4mm. EFL: 4.0- 4.60mm. F.NO: 0.9/1.2/2.2/2.6/2.8. MBFL: 1.48- 5.93mm. Get more information about the 4mm lens angle of view and a 4 mm lens price now! Being one of the biggest CCTV lens suppliers in China, we also provide other kinds of CCTV lens such as 2.8 mm lens fov, 4.5 mm lens, and so on.