Our CCTV camera lenses come in many forms, including fixed focal-manual iris, fixed iris-manual focus, varifocal, motorized zoom lens options, and pinhole lenses. Each security camera lens we offer provides unique functionality and is designed for different surveillance applications. Auto-iris lenses are designed for outdoor use, or any applications with variable lighting conditions. Fixed lenses provide fixed focal lengths from super wide angle to telephoto depending on the camera format and intended application. Varifocal lenses are designed to meet a variety of applications, providing the flexibility to adjust between different focal lengths with a single lens.
100m, 500m or even 1km away objects can also be clearly displayed on the monitor. The decisive factor in this issue, in general, is the focal length of the lens, the longer the focal length, "see" the farther away, but at the same time the field of view is smaller, the results narrowed the viewing range.
In order to be able to more clearly detect the target within the scope of monitoring and automatic tracking, the general requirements of the target in the CCD target surface occupies at least three lines of television lines. To be able to distinguish the characters, the general should ask the person's facial imaging in the 356mm (14in) monitor accounted for more than 12.7mm (0.5in).
In practical applications, users often ask the camera to see how far objects or the camera can see how wide the scene and other issues, which in fact should be selected by the focal length of the lens to decide, in addition to the The resolution of the selected camera and the resolution of the monitor.
The focal length of the optical system is the distance from the main point of the optical group to the focal point. And the focal length of the lens is actually a combination of the composition of the focal length of the lens group, which determines the size of the image taken with different focal length of the lens on the same location of the camera, with long focal length camera lens intake of the scene size Large, and vice versa, with a short focal length camera lens intake of the scene size is small.
Talk to our engineers today, find out what we can help with your own custom CCTV lens development.