Features 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 Lens Material: Aluminum alloy, glass composite material Resolution: 10Mega Pixel Image Format: 1/1.8in Focal Length: Approx. 2.8mm/0.11in Aperture: F1.6-16 Mount: CS Field Angle (DxHxV) 5%: 1/1.8in: 172°x160°x108° Optical Distortion: -88.00% MBF: Approx. 7.8mm/0.31in BFL: Approx. 12.53mm/0.49in M.O.D.: Approx. 0.05m/1.97in Dimension: Φ35x36.8mm Optical Length: Approx. 49.33mm/1.94in Lens Structure: Aluminum alloy and10G Operation: Iris Manual Focus Manual Operating Temperature: -20°C-and80°C Package List 1 x Lens1 x Adapter Ring Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.