Selecting the right camera lens
A security camera lens size determines the field of surveillance view that the camera provides. Our fixed security camera lenses range from 2.8mm to 16mm. The larger the size of the lens, the more narrow and zoomed in the field of view is. Most of our fixed lens cameras come standard with a 3.6mm or 6mm lens. A 3.6mm lens is designed to provide an approximate 72 degree field of view. If you need precise adjustment to the angle and field of view for your application, a varifocal lens camera is recommended so that you can adjust the lens to the exact view that you need.
Here are some sample still photos taken using different lens sizes in a room that is 20 x 20 feet. The security camera is mounted in the corner of the room from a 10 foot ceiling.
The below sample video was recorded using a professional box CCTV camera with a fixed 3.6mm and a 8mm lens. The camera is installed on the underside of roof soffit and fascia to monitor activities of a driveway in front of a house. Notice how the 8mm lens is zoomed in on the field of view more.
|Sample 3.6mm lens CCTV video||Sample 8mm lens CCTV video|