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 or 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 LensMaterial: Aluminium AlloyModel: CW 3514 10MP AFocal Length: 35mmImage Format: 1in(16mm or 0.63in, 12.8x9.6mm or 0.5x0.38in)Relative Aperture: 1:1.4Mount: C MountField Angle: 1in 20.9x15.8 2 or 3in 14.4x10.8 1 or 1.8in 11.8x8.8 1 or 2in 10.5x7.9Back Focal Length: 17.53mmIris: Manual or LockZoom: -Distortion: 0.03 percent Resolution: 10 Mega PixelM.O.D: Approx. 0.30m or 11.81inSize: Approx. 40.0x55.0mm or 1.57x2.17inFilter Size: M37.5x0.5p.Package List:1 xC Mount Lens1 x AdaptorNote:Optical filming is very important for lens imaging, so it needs to be treated with care to avoid scratching the coating film.