Borsche CCTV Camera Lens

Today I will give a brief introduction about CCTV camera lens. We all know, the Lens is an essential part of CCTV camera, like our eyes which can catch the object. The different point is : our eyes can view really objects, but the camera will catch image depend on in different environment. For example: it will show yellow in dark Yellow -fluorescent lamp.

The specification of Borsche CCTV Camera Lens:

Normally: we use 3.6mm/6mm/8mm/12mm/16mm/25mm/30mm/60mm Lens
What we should pay attention to is all these number above are the focal length , not the physical dimension

Applications:

1. Wide-angle lens: perspective:>90°focus length: 2.5mm; 2.8mm
2. Standard lens: perspective about:30°, this kind of Lens are widely used.
3. Zoom length: min focal length:6mm, max :45°. the focal length can be adapted to enlarge or narrow the image by adjusting the position of the focus. (moving the relative position of the lens) The longer the focal length, the broader the horizontal field of view, and  the bigger the image.
4. Pinhole lens: Always be used for covert observation, often be installed in such as ceiling or wall place, etc .Like our Mini camera and Spy camera.
5. Long focal length lens: like 60mm,135mm etc, these two types of lens can be applied to working environment where a broad and spacious view is required, for instance, dock, square, stations, ect.
I will give a example below:
Example: A. camera with 3.6mm lens  v.s.  B. camera with 12mm lens
Effective viewing distance: A < B
Field of view: A>B
Applicable working environment: A: narrow targeted space, like lifter or room where big angle of view is required.  B: open and spacious environment
According to the classification of Iris
On the basis of iris
1.  Fix lens with fixed iris
2.  Fix lens with manual iris
3.  Fix lens with auto iris
4. Zoom lens with auto iris

Thanks for your attention!