Features: 1.Important Parameters: This lens works with C mount, with fixed zoom and manual focus, iris, approximate 75mm/2.95in focal length, and 10Mega Pixel. 2.Tough Shell: The lens is protected by high quality aluminum alloy shell, which can be used in extreme environments, and better protect the lens. 3.Clear: Covered with optical coating, which will ensure sharp image with low distortion, providing you better shooting experience. 4.High Quality: The lens can be operated with manual focus and adjustable aperture, with no lens shadows, no vignetting, and high image quality. 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: Manual Focus Lens_x000D_ Material: Aluminium Alloy_x000D_ _x000D_ Resolution: 10Mega Pixel_x000D_ _x000D_ Image Format: Approx. 1in/2.54cm (16, 12.8x9.6)_x000D_ _x000D_ Focal Length: Approx. 75mm/2.95in_x000D_ _x000D_ D/f: F2.8-16_x000D_ _x000D_ Mount: C mount_x000D_ Field Angle (H x V): 1in, 9.72 x 7.23_x000D_ Field Angle (H x V): 3in, 6.70 x 5.02_x000D_ _x000D_ Field Angle (H x V): 1/1.8in, 5.50 x 4.01_x000D_ _x000D_ Field Angle (H x V): 1/2in, 4.90 x 3.70_x000D_ _x000D_ Distortion: -0.05%_x000D_ MOD: Approx. 1.2m/47.24in_x000D_ Dimension: Approx. 39 x 46mm/1.54 x 1.81in_x000D_ _x000D_ Filter Size: UV M35.5x0.5P_x000D_ Zoom: Fixed_x000D_ _x000D_ Iris: Manual_x000D_ _x000D_ Focus: Manual_x000D_ _x000D_ Operating Temperature: -20 to +80 PackageList: 1 x Lens 1 x Adapter Note: Optical coating is essential for lens imaging, it is necessary to gently handle the coating to avoid scratching when using