1、8mm Focal: CS mount lens is designed with 8mm focal length, 1/8in image format, professional design offers more professional shooting to you. 2、High Accuracy Focus: The CS mount lens with manual focus and adjustable aperture, provides high precision focus for highly accurate shooting experience. 3、Clear Images: Low distortion, high compatibility, advanced glass composites with anti reflective coatings produce detailed images with high contrast. 4、Wide Application: Images up to 10Mega Pixel can be used in high resolution cameras, and is suitable for most security camera models. 5、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. 1 x Lens1 x Adapter Ring Item Type:  2.8mm Focal Length LensMaterial: Aluminum alloy, glass composite materialResolution: 10Mega PixelImage Format: 1/ 1.8inFocal Length: Approx. 2.8mm/ 0.11inAperture: F 1.6-16Mount: CSField Angle (DxHxV) ±5%: 1/ 1.8in: 172°x160°x108°Optical Distortion: - 88.00%MBF: Approx. 7.8mm/ 0.31inBFL: Approx. 12.53mm/ 0.49inM.O.D.: Approx. 0.05m/ 1.97inDimension: Φ35x 36.8mmOptical Length: Approx. 49.33mm/ 1.94inLens Structure: Aluminum alloy +10GOperation:Iris ManualFocus ManualOperating Temperature: -20°C~+80°C