Feature: 1. 5MP high definition lens, observe objects more clearly with low distortion. 2. The zoom lens can change the shooting range by changing the FL, very helpful for picture composition. 3. One zoom lens can serve as several prime lens lenses, saves the time for lens replacement. 4. Has high compatibility, can be applied to most security cameras, aperture can be fixed and locked for more convenience. 5. Made of high-quality aluminum alloy material, strong and durable, has stable performance. Specification: Item Type: Zoom Lens Material: Aluminium Alloy Color: Black+Red Pixel: 5MP FL: 5-50mm Relative Aperture: 1:1.4 Image Size: 1/2.7in 1/3in Mount: CS Mount Horizontal Field of View: 1/2.7in 51°-6.1° 1/3in 45°-5.5° Minimum Object Distance: 1.5m Optical Back Focal Length (BFL): 8.1-15.73mm Working Temperature: -20℃-60℃ Aperture: Manual Aperture Package List: 1 x 5MP Zoom Lens