Fixed Zoom Lens 75mm Focal Length Low Distortion 10MP Pixels Industrial Telephoto Lens Optical Coating High Temperature            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 Lens    Material: 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 mount    Field 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/47.24in    Dimension: Approx. 39 x 46mm/1.54 x 1.81in    Filter Size: UV M35.5x0.5P    Zoom: Fixed    Iris: Manual    Focus: Manual    Operating Temperature: -20℃ to +80℃