Feature:1. 2.8mm Focal: CS mount lens is designed with 2.8mm focal length, 1/1.8in 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.Specification:Item Type: 2.8mm Focal Length LensMaterial: Aluminum alloy, glass composite material.Resolution: 10Mega PixelImage Format: 1/1.8inFocal Length: Approx. 2.8mm/0.11inAperture: F1.6-16Mount: CSField Angle (DxHxV) 5%: 1/1.8in: 172x160x108Optical Distortion: -88.00%MBF: Approx. 7.8mm/0.31inBFL: Approx. 12.53mm/0.49inM.O.D.: Approx. 0.05m/1.97inDimension: 35x36.8mmOptical Length: Approx. 49.33mm/1.94inLens Structure: Aluminum alloy +10GOperation:Iris ManualFocus ManualOperating Temperature: -20C~+80CPackage List:1 x Lens1 x Adapter Ring