Feature: 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 LensMaterial: Aluminium Alloy .Resolution: 10Mega Pixel Image Format: Approx. 1in/2.54cm (Φ16, 12.8x9.6) Focal Length: Approx. 75mm/2.95in D/fˊ: F2.8-16 Mount: C mountField Angle (H x V): 1in, 9.72° x 7.23°Field Angle (H x V): 3in, 6.70° x 5.02° Field Angle (H x V): 1/1.8in, 5.50° x 4.01° Field Angle (H x V): 1/2in, 4.90° x 3.70° Distortion: -0.05%MOD: Approx. 1.2m/47.24inDimension: Approx. 39 x 46mm/1.54 x 1.81in Filter Size: UV M35.5x0.5PZoom: Fixed Iris: Manual Focus: Manual Operating Temperature: -20℃ to +80℃ Package List: 1 x Lens1 x Adapter Note: Optical coating is essential for lens imaging, it is necessary to gently handle the coating to avoid scratching when using