1、Professional Lens: Deliver in 25mm and 35mm focal length C mount lens, 1in image size, 10 mega pixel, professional design provides you with more professional shooting. 2、Adjustable Aperture: The camera C mount lens with manual zoom and adjustable aperture, allows you to get a bit more clarity, focus and the ability to change lenses. 3、Durable Material: The camera C mount lens shell is made of high quality aluminum alloy materials with excellent resistance to high temperature, not easy to rust or deform. 4、High Performance Lens: The industrial camera lens is strictly engineered and produced after extensive tests, no lens shading, no dark corners, decent image quality. 5、Wide Application: Varifocal lens adopts C mount design, highly recommended to someone want to get better quality for both still and video for the home or industrial security system. 2 x Lens2 x Adapter Ring Item Type: C Mount LensMaterial: Aluminum AlloyUses: Surveillance cameras, DIY camerasFocal Length: Approx. 25mm/ 1.0in, 35mm/ 1.4inFormat: 1in (Φ16, 12.8x 9.6）D/f': 1: 1.4Iris: Manual, LockZoom: -MTF: 10 Mega PixelFilter Size: M 37.5x 0.5p