If you are choosing a good CCTV system, then you must make the correct choice of camera. Although specifications are given in order to compare and judge different cameras, this is not actually vital. It is not important even when compared to design of cameras. Here is a guide to buying cameras that sheds light on the key points that will help you in finding a camera with the right application.
TVL or Television lines
In case, you might not be aware about TVL – It is the number of horizontal lines a camera can record. However, there is also the need to ensure good quality of the lens because no matter how good the TVL is, it will never let the lens focus on details beyond natural ability. Let us understand this with an example: At D1 resolution, there are around 400,000 pixels for which a lens is desired to concentrate on sufficient pixels to capture the details.
An important thing to keep in mind is that many quote misleading figures as retailers mention TVL figures that can be attainted only in black and white at night.
Zoom or varifocal CCTV camera lens
It is always recommended to choose a CCTV system that has a camera with a zoom lens. By paying a bit more over a fixed lens camera you can enjoy more flexibility in your security system. After getting the camera fixed in a desired area one can easily zoom in or out according it to your needs.
DSP or chipset is the brain of the computer. How capable a camera is in filming in low light levels, to different lighting or climatic conditions, and also the ease of use are dependent on the choice of DSP. Care has to be taken when buying a camera as many manufacturers go to the extreme at the time of incorporating DSP based features in their cameras, and even installers aren’t able to understand it completely.
1/4 inch or 1/3 inch CCD Sensor – Why opt for 1/3 inch?
This measurement refers to the size of CMOS or CCD image sensor. It is vital to keep in mind that the smaller the image sensor is the less is its sensitivity to the light and it is more likely to suffer image deterioration or “noise”. Therefore, it is preferable to purchase a camera that has 1/3 inch sensors to view less deteriorated images.
Now you are aware of the important aspects that will help you in buying the most suitable CCTV camera for your home ensuring complete security and peace of mind.