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. 40.0x50mm/57x17in, 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. 1 x C Mount Lens1 x Adaptor Item Type: C Mount LensMaterial: Aluminium AlloyModel: CW 3514 10MP AFocal Length: 35mmImage Format: 1in(16mm/ 0.63in, 12.8x 9.6mm/ 0.5x 0.38in)Relative Aperture: 1: 1.4Mount: C MountField Angle: 1in 20.9°x 15.8°; 2/3in 14.4°x 10.8°; 1/ 1.8in 11.8°x 8.8°; 1/2in 10.5°x 7.9°Back Focal Length:  17.53mmIris: Manual or LockZoom: -Distortion:  0.03%Resolution: 10 Mega PixelM.O.D: Approx. 0.30m/ 11.81inSize: Approx. 40.0x 55.0mm/ 1.57x 2.17inFilter Size: M 37.5x 0.5p