1、8mm 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. 2、High 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. 3、Reliable 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. 4、Excellent Performance: The 8.0mm focal length lens is strictly engineered and manufactured after extensive test, no lens shading, no dark corners, decent image quality. 5、Wide 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. 1 x CS Mount Lens Item Type: CS Mount LensMaterial: Aluminum AlloyFocal Length: Approx. 8.0mm/ 0.31inFormat: 1/2inD/f': 1.2Mount: CSF. 0.V (D/H/V): 48°Back Focal Length: Approx. 7.53mm/ 0.3inIris: Manual, LockMTF: 3 Mega PixelM. 0.D: Approx. 0.2m/ 7.9inSize: Approx. 30x 34.00mm/ 1.2x 1.3in