The DM-TM-2812VF TAMRON security camera lens provides a Wide angle, by using a precise crafted vari-focal 2.8mm to 12mm, which gives great flexibility for your security installations. With manual-iris, this lens can be adjusted to the perfect setting for your lighting conditions. The DM-TM-2812VF provides a F1.4 bright aperture to help you to get a better and cleaner picture quality.