Aperture D/f': F1.8; Field of View: 140°/112°/84° (Diagonal/Horizontal/Vertical Angle); Image Format: 1/2.7; Mount Thread Type: M12*0.5; Focal Length Description: 2.8mm; Optical Back Focal Length (BFL): 5.7mm; Outer Size: 15.3x14 mm / 0.6x0.55 inch (L*Dia); Package List: 1Pcs x 2.8mm CCTV Camera Lens | Advantage: The camera glass lens uses industrial-grade optical glass, and the multi-layer coating process uses a clear and lifelike image, and the night vision is clear and visible. High-definition lenses can enhance the clarity, contrast, and details of the image, thereby improving the overall video quality for accurate identification and analysis. | Instruction: The thread specification is a standard M12x0.5 screw, suitable for most types of surveillance cameras. | Application: CCTV camera lenses are commonly used in closed-circuit television (CCTV) systems for security monitoring, surveillance, traffic monitoring, industrial inspection and other applications that require video recording and analysis. Suitable for indoor and outdoor areas such as homes, factories, shops, bars, parking lots, warehouses, etc. | NOTE: Please check the compatibility of the lens with your device before purchasing.