CCTV or closed circuit television were usually installed for security purposes in government and commercial buildings. Nowadays, we can found CCTV installed in almost every public buildings like shopping malls, schools, or campuses. Right now CCTV has also gained popularity of use in personal spaces like home. If you are considering to get CCTV for your home or office, there are a few things to take note.
The CCTV Lens
The first component you have to check is the CCTV lens. CCTV lens is used to gather the lights. The lens controls focus on what we can see through the CCTV. It is responsible for the ability to catch the details of the view, for example, whether a person’s face can be seen clearly or whether we can read a vehicle’s plate number.
The important feature buyers have to check in choosing CCTV lens is the feature of zooming. There are two types of zoom; the first is the digital zoom which primarily works like the zooming feature on smartphone’s camera, and the second one in the optical zoom which works like the zooming feature on a professional DSLR camera. The digital zoom can not provide more information about an image as it is just an enlargement of a picture, but the optical zoom truly shows a clearer component of an image. Choosing the right lens is crucial as the lens determines the input that will be processed in CCTV for viewing.
The CCTV Sensor
The next component to check is the CCTV sensor. There are a couple of things to look when choosing the CCTV sensor specifications. The first thing is the type of the sensor, and the second thing is the size of the sensor. The sensor types we usually find in the market are CMOS and CCD. CCD are more expensive and need more power than CMOS. Therefore CCD sensor is more sensitive and can produce a brighter image which is very important for identification purposes. The size of the sensor determines the quality of the images produced by CCTV. The larger the size, will result in higher image quality. Here’s a review of CCTV’s in case you need one. https://www.ddcountermeasures.com/arlo-security-cameras-reviews/
The CCTV Output Resolution
The next thing buyers need to check is the TV output resolutions, which means the number of horizontal lines of resolution that is resulted as the output or also known as TVL. The common range of CCTV resolutions is coming in between 380 TVL to 540 TVL.
In most cases, the high resolution is not always the solution. Buyers need to match the capacity level between the lens, the sensor, and the resolutions. When the three-match, then the CCTV can present its best images.