CCTV Camera comes with IR illuminators and Varifocal Lens called as IR Varifocal Camera.
Varifocal Lens offering different focal lengths to cover the most frequently used angles of view. Changing the focal length allows the user to adjust coverage without moving the camera or changing the lens.
This lens allows the user / installer to manually adjust the camera’s field of view. Because of their adjustability, Varifocal lenses are great when a camera will serve more than one purpose or to ensure proper focus without first determining an exact fixed lens focal length.
Color cameras that switch to black and white at night are coupled with IR illuminators for night time surveillance, making them suitable for both day and night viewing.