Feature:1. Important Parameters: This lens works with CS mount, with 23 degrees horizontal feld of view, 1/2in lens optical format, and 30 x 34mm/1.18 x 1.34in dimension diameter.2. Tough Shell: The lens is covered by high quality aluminum alloy shell, which resistant to high temperature, and better protect the delicate lens.3. Highly Accurate: The easy to grip focus ring provides precise focus for highly accurate shooting, ensures sharp image with low distortion.4. Adjustable Aperture: This lens allows you to adjust aperture of the lens in response to the light levels it affects parameters in the imaging system.5. Easy Installation: You just need to screw and fix the aperture lens into the back focus adjustment ring on your HD camera.Specification:Item Type: Fixed Focal LensMaterial: Aluminium AlloyModel No: CW-FM1614-3MPFocal Length: Approx. 16mm/0.63inOptical Format: 1/2inD/f': 1.2Mount: CS mountField of View: 23 degree (H).Back Focal Length: Approx. 7.53mm/0.30inIris: Manual lockMTF: 3Mega PixelMOD: Approx. 0.2m/7.97inDimension: 30 x 34.00mm/1.18 x 1.34inPackage List:1 x LensNote:Optical coating is essential for lens imaging, it is necessary to gently handle the coating to avoid scratching when using