Buying CCTV cameras is an expensive matter. So, it should be well-thought-out before buying CCTV Camera. The most important part of a CCTV camera is the camera , it acts as the eye of the system.
At first buying big CCTV camera is not a good decision. First, you need to identify your needs or wants. Once you have identified the requirements, it becomes straightforward to buy a camera that is compatible with it. If the demand is known, then the buyer can make a quick decision to buy the good camera properly. So First, you need to know enough information about CCTV cameras.
How CCTV cameras work
Most CCTV or closed-circuit TV cameras used for home security are solid-state electronic devices that are connected to a central recorder. So, it transmits at a certain location and that is why it is called closed-circuit camera.
The main elements of a camera are sensors, lenses, and digital signal processors. The job of the lens is to focus on the light that the sensor captures as an image and transfers it from the sensor to the DSP. The DSP converts it as a TV signal. The signal is then transmitted by UTP cable or wirelessly to the central location for storage or inspection.
Things to consider when buying a CCTV camera
There are some important elements to consider when buying a CCTV camera. There are one or more hardware components that you must need to know.
Choosing the right lens
The job of the lens is to collect light for the sensor. Everything the user sees or records on the DVR is through the lens. How far a car’s number plate can be read and someone’s face can be recognized is determines the lens because the lens controls the focus. In many cases the lens is more efficient than the higher output resolution because the output is always limited by the input, and the lens is the input system. Moreover, zoom lenses are also available in the market. Some CCTV cameras have digital zoom and others have optical zoom which is controlled by a lens. The buyer should focus optical lens on digital zoom as much as possible. The problem with digital zoom is that it can’t add any data to the original image. Optical zoom can add new theory/ data to the original image because the image changes as the light reaches the sensor.
Choosing the right sensor
Not all types of digital sensors are the same. There are two things to consider when verifying the specifications of a CCTV camera sensor.
1. The sensor type
2. sensor size.
Most sensors are CMOS or CCD. CMOS performance and sensitivity are both relatively lower than CCD. As a result, it cannot capture clear images. So, CMOS should not be used for identification. The main advantage of CMOS is its price is lower than CCD.
To capture clear images, much more signal from CMOS based sensors are to be processed. The larger the size of the sensor, the more light processes and better images it can capture. Most sensors are 1/4 inch (10.16 cm) or 1/3 inch (ca. 8 cm) in size. The large sensor is not only captures the ambient light, also gives the extra DSP information to work. That is helpful for relatively low-capacity budget cameras.
Choosing the right output resolution
A common specification for CCTV camera is the number of flat lines of TV resolution. Its range is up to 600 TVL. Different cameras of 360 TVL and 540 TVL are also available.Although experts consider 420 TVL to be the minimum, it does not apply in all cases. The output depends on the input. So if the lens, and the sensor cannot match the output resolution then the whole of the extra resolution goes destroyed. So the important thing is to have enough resolution. The image captured in the camera can be clearly displayed.
Different types of CCTV cameras
All CCTV cameras are not in the same size and shape. Cameras also vary based on need.
The following are examples of basic three types cameras.
1. Bullet camera
These small cylindrical cameras are usually used in ambient situations where prudence is very important. However, it does not need to be permanently installed in the security dome. It is suitable for use in shops and service organizations.
2. Dome Camera
Dome camera is great for surveillance. This is not only protects the camera from casual damage but also provides maximum security. it is almost impossible to understand which way the camera points.
3. IR Day / Night Camera
Regardless of the lighting condition, these cameras provide 24 hours outdoor coverage. These have a certain color image during the day and are converted to black and white for infrared view at night.Which type of camera he will use depends on the purpose and needs of the user. Choosing a camera is easy if you can determine the needs.
How to Choose the right CCTV camera
The first thing to consider when buying the right camera is the lens. The lens provides a clear image to the user. The second is the sensor.Buyer should purchase a 1/3 inch (ca. 8 cm) CCD sensor as it provides most of the information to the DSP for processing.Last feature is the camera output resolution. Its usefulness depends on the first two features. In the second stage, after determining the capability of the hardware, the buyer has to decide which camera is suitable for his needs. Landlords can use day / night cameras to cover a wide outdoor area, such as to protect their property. Bullet cameras are good for monitoring staff and dome cameras are good for shops or businesses.
What is the price of CCTV camera?
A good CCTV camera is priced by combining camera quality, providers and many equations. You can now visit the websites of some CCTV camera providers to find out the price for yourself. Also do a Google search for
CTV camera price in (your country name) and visit some websites to get idea. You can directly check on Amazon and eBay about the CCTV camera prices, and their facilities.