Item Type: 12-36mm F2.0 LensMaterial: ABSMounting Type: C MountFocal Length: Approx. 12-36mm / 0.5-1.4inAperture: F 2.0 CAperture Focus Operation: ManualLens Size: Approx. 37.5mm (Diameter) x 54mm / 1.5x2.1inViewing Angle: 11-31Horizontal Resolution: >100lp Per MmFilter Thread: M35.5x 0.5Operating Temperature: -20 - +60Back Focal Length: Approx. 12.60mm/0.5inPackage List1 x 1236mm F2.0 Lens1 x Adaptive Base13MP HD LENS: C mount camera lens supports 3MP HD lens, 1236mm zoom manual aperture lens C mount lens. 21/1.8 INCH FORMAT SENSOR: F2.0 camera lens uses a 1/1.8 inch format sensor to deliver crisp, high contrast images with clear colors from corner to corner. 3OPTICAL GLASS: Camera lens uses special optical glass, high accuracy aspherical lens, low dispersion glass and high refractive index glass. 4LOW DISTORTION: 1236mm camera lens with low distortion lens is best suited for color, black and white and day night cameras. 5HIGH RESOLUTION: Maximize the optical performance, you can get all resolution lens megapixel camera, IP camera and high resolution camera.