CCTV lenses, that is, CCTV camera lenses, have more and more application scenarios today. It can be said that CCTV cameras are needed wherever there are people and things.
In addition to being a security management tool, CCTV cameras are also used in crime prevention, emergency response, environmental monitoring and other applications, and their role cannot be underestimated.
1.How do CCTV lenses work?
For CCTV lenses, we can look at its workflow:
(1)Capturing images
The CCTV camera captures images of the target area through image sensors and converts them into electrical signals.
(2)Processing images
The image signal is transmitted to the internal image processor, which then performs automatic exposure adjustment, white balance correction, noise filtering and other operations to optimize image quality.
Common CCTV lens
(3)Data transmission
The processed image data is transmitted to the storage device or monitoring system through a data transmission interface (such as a network or a data line). Data transmission can be real-time or non-real-time.
(4)Data storage and management
Image data is stored on the surveillance system’s hard drive, cloud storage, or other media for subsequent playback, retrieval, and analysis. The surveillance system usually provides a visual interface for users to manage and access stored data.
CCTV lens in the workplace
2.Several common questions about CCTV lenses
(1)How to choose the focal length of the CCTV lens?
When choosing the focal length of a CCTV lens, generally follow the following principles:
①Weigh focal length selection based on size and distance of the object being monitored.
②According to the level of detail you want to observe the object: if you want to see the details of the monitored object, you need to choose a lens with a longer focal length; if you only need to see the general situation, choose a lens with a shorter focal length.
③Consider the limitations of the installation space: If the installation space of the lens is small, the focal length should not be too long, otherwise the image will be too partial.
Various CCTV lens
(2)Is it better if the focal range of a CCTV lens is larger?
The choice of focal length of CCTV lens needs to be determined according to the actual surveillance needs. Generally speaking, a lens with a longer focal length can cover a longer distance, but it also means that the viewing angle of the picture is narrower; while a lens with a shorter focal length has a wider viewing angle, but it cannot see the details in the distance.
Therefore, when choosing the focal length of the lens, it is necessary to choose according to the actual surveillance environment and the goals to be achieved. It is not necessarily the case that the larger the focal length range, the better.
(3)What to do if the CCTV lens is blurry?
If the CCTV lens is found to be blurry, there are several possible solutions:
①Adjust the focus
The image may be blurry due to improper lens focus. Adjusting the focus may make the image clear.
②Clean the lens
The lens may be blurred due to dust or other factors. At this time, use appropriate cleaning tools to clean the lens.
③Check the artifact switch
If the lens is still blurry, you can check the artifact switch of the lens to see if it is turned on.
④Replace the lens
If the above methods cannot improve the problem, it may be that the lens is aging or damaged, and a new lens needs to be replaced.
Common CCTV camera groups
(4)What causes blurry CCTV lens?
The main reasons for blurry CCTV lenses may be: dirt on the lens surface, condensation of water vapor, vibration or impact on the lens causing focusing problems, fogging inside the camera or module problems, etc.
(5)How to remove dust from CCTV lens?
①You can use a blower or other similar tools to blow away the dust on the lens surface.
②You can use high-quality lens cleaning paper or special lens cleaning cloth to clean the lens.
③You can also use special lens cleaning fluid for cleaning, but remember to follow the prescribed method to avoid damaging the lens.
Final Thoughts：
If you are interested in purchasing various types of lenses for surveillance, scanning, drones, smart home, or any other use, we have what you need. Contact us today to learn more about our lenses and other accessories.
Post time: Feb-21-2025
