Item Type: CS Mount Lens Material: Aluminum Alloy Focal Length: Approx. 8.0mm/0.31in Format: 1/2in D/f': 1.2 Mount: CS F.0.V (D/H/V): 48 Back Focal Length: Approx. 7.53mm/0.3in Iris: Manual, Lock MTF: 3 Mega Pixel M.0.D: Approx. 0.2m/7.9in Size: Approx. 30x34.00mm/1.2x1.3in Package List 1 x CS Mount Lens The optical coating is very important for the imaging of the lens, and it needs to be handled with care to avoid scratching the coating. 18mm Focal Length Lens: CS mount lens is designed for 8.0mm focal length, 1/2in image size, 48 field of view, professional design offers more professional shooting to you. 2High Accuracy Focus: The CS mount lens with manual focus and adjustable aperture, and the easy to grip focus ring provides very accurate focus for highly accurate shots. 3Reliable Materials: The camera lens is made of premium aluminum alloy shell structure with excellent resistance to high temperature, not easy to rust or deform, durable. 4Excellent Performance: The 8.0mm focal length lens is strictly engineered and manufactured after extensive test, no lens shading, no dark corners, decent image quality. 5Wide Usage: High quality CCTV camera lens adopts CS mount design, you can get a bit more clarity and focus, recommended for home security system or DIY camera.