Feature: 1. High Definition: 10MP high definition manual iris lens, with 35mm focal length, not easy distortion, high quality pictures. 2. Adjustable Aperture: Camera lens with manual focus and adjustable aperture, also can be fixed and locked, no lens shading, no dark corners. 3. High Quality Material: C mount lens is made of high quality aluminium alloy material, high temperature resistant, rustproof and durable. 4. Compact Size: The size of industrial camera lens is approx. 40.0x55.0mm/1.57x2.17in, lightweight and easy to carry, and filter size is M37.5x0.5p. 5. Easy Installation: Prime lens is easy to install, no complicated operation is required, convenient for using, save your time and energy. Specification: Item Type: C Mount Lens Material: Aluminium AlloyModel: CW 3514 10MP AFocal Length: 35mm Image Format: 1in(16mm/0.63in, 12.8x9.6mm/0.5x0.38in) Relative Aperture: 1:1.4Mount: C Mount Field Angle: 1in 20.9°x15.8°; 2/3in 14.4°x10.8°; 1/1.8in 11.8°x8.8°; 1/2in 10.5°x7.9°Back Focal Length: 17.53mm Iris: Manual or Lock Zoom: - Distortion: 0.03% Resolution: 10 Mega Pixel M.O.D: Approx. 0.30m/11.81in Size: Approx. 40.0x55.0mm/1.57x2.17inFilter Size: M37.5x0.5p . Package List: 1 x C Mount Lens1 x Adaptor Note: Optical filming is very important for lens imaging, so it needs to be treated with care to avoid scratching the coating film.