Product-related text: - 1.8mm 170° wide angle board lens for CCTV cameras - With standard M12x0.5 thread, suitable for 1/3inch and 1/4inch CCD chipsets camera - 170° wide angle offers wider field of view and with an aperture of F2.0 - Infrared lens is suitable for any lighting conditions, especially for the night - Great performance, shows clear and undistorted images - Material: Plastic - Angle of View: 170° Wide Angle - Aperture D/f': 2.