Item Type: C Mount Lens Material: Aluminum Alloy Uses: Surveillance cameras, DIY cameras Focal Length: Approx. 25mm/1.0in, 35mm/1.4in Format: 1in (16, 12.8x9.6 D/f': 1:1.4 Iris: Manual, Lock Zoom: - MTF: 10 Mega Pixel Filter Size: M37.5x0.5p Package List 2 x Lens 2 x Adapter Ring The optical coating is very important for the imaging of the lens, and it needs to be handled with care to avoid scratching the coating. 1Professional 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. 2Adjustable 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. 3Durable 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. 4High Performance Lens: The industrial camera lens is strictly engineered and produced after extensive tests, no lens shading, no dark corners, decent image quality. 5Wide 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.