Features 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 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 Lens Material: Aluminium Alloy Model No: CW-FM1614-3MP Focal Length: Approx. 16mm/0.63in Optical Format: 1/2in D/f': 1.2 Mount: CS mount Field of View: 23 degree (H) Back Focal Length: Approx. 7.53mm/0.30in Iris: Manual lock MTF: 3Mega Pixel MOD: Approx. 0.2m/7.97in Dimension: Φ 30 x 34.00mm/1.18 x 1.34in Package List 1 x Lens 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.