The Luxar LX3D0550S14IR Varifocal Auto-Iris lens provides a high zoom angle using a precise crafted vari-focal length of 5mm to 50mm, which gives you a great flexibility for your security installations. With the added feature of a DC auto-iris, this lens can automatically adjust to the perfect setting for your lighting condition. The LX3D0550S14IR provides a F1.4 bright aperture that helps you to get a better and cleaner picture quality.Using this IR-corrected lens with a Day and Night Camera, it will give sharp and well focused image at night time.