Although buying a CCTV camera was a costly affair a few years ago, now that the price is affordable, many have started using it for their personal and institutional needs. You can buy CCTV cameras whenever you want, but how much guarantee is there that it will give you the performance you want? So before buying it you should think about some things that will save you from regretting later. Let’s see what those considerations are.

Let’s take a look at the things that are important to know before buying a CCTV camera.

How do CCTV cameras work?

Most of the CCTV cameras used for home security are solid-state electronic devices connected to a central recorder. It is also known as the Closed Circuit Camera because it transmits video within a certain range.

The main components of a CC camera are lenses, sensors and DSP or digital signal processors. The main function of the lens is to focus on the light which is then captured as a sensor image. It then moves from the sensor to the DSP and that DSP converts it into the TV signal that we see on the screen. Note that wireless signals are stored for later inspection at designated locations.

Considerations when buying CCTV cameras

Now let’s discuss some important things that will help you choose the right model.

Determine what kind of needs you have

At the beginning of buying CCTV cameras you should think about why you should buy a camera. Suppose someone needs to monitor his home and then someone needs him for his organization. Whatever it is, you need to specify your needs first. It will be very easy to buy your camera if you can identify it.

Basically knowing the demand, a buyer can make the right decision and choose the best camera model accordingly. This is why you need to know enough information about your CCTV camera in the beginning.

Learn about existing lenses

The job of the camera lens is to capture the light for the sensor. Everything that the user sees or that is recorded on the DVR is through the lens. The lens determines how far an object can be seen because the lens controls the focus.

Again you will find zoom lenses in the market. Some CCTV camera models have digital zoom and others have optical zoom which is controlled by a lens. A buyer’s optical zoom should be more important than digital zoom. Digital zoom basically does not add any theory to the image while optical zoom can add new theory to the original image.

Selecting the right sensor

Not all digital sensors are the same. There are two things to consider when verifying the specifications of a CCTV camera sensor: sensor type and sensor size. Most sensors are not CMOS but CCD. CMOS’s performance and sensitivity are both relatively lower than CCD’s. As a result, it cannot capture clear images. Therefore, CMOS should not be used for identification. However, the advantage of CMOS is that it costs less than CCD. The CMOS-based sensor has to process much more signals to capture clear images.

Selecting the correct output resolution

A common specification for CCTV cameras is the number of flat lines of TV resolution or TVL. Its range is up to 800 TVL. Various 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 (determined by the DSP) then the whole of the extra resolution is wasted. So the important thing is to have enough resolution by which the image captured in the camera can be clearly displayed.

Where to buy CC camera at right price in Bangladesh?

There are many companies in Bangladesh that can provide you with both low cost and high cost CCTV. The quality of which is excellent and all those vendors also offer installation facility. So you are getting a full benefit.

Olefins Trade Corporation is a trusted organization that sells a wide range of CCTV cameras, conference systems, and security equipment. You will get after sales service from them.

And you will also find famous brand Lumnes cameras from them. You may know that Lumens is a brand that makes very good quality conference cameras, web cameras, PTZ cameras. So what kind of camera do you need, you can get everything at Elephants Trade Corporation. Visit for details Olefins Trade Corporation –Or call 01969300940, 01719300940.