How to buy security cameras system properly

How to buy security cameras system properly

Select a camera.

It is almost impossible to describe all types available to this short article. We will focus our attention on the types of security cameras the most popular and widely used in its place.

cameras CCTV CMOS or produce images with CCD (charge couple device) chip. Small, very low price CCTV cameras usually use CMOS technology, image quality and a very low sensitivity to light. decent quality cameras use CCD technology. The size of the CCD, usually 1 / 4 ", 1 / 3 or 1 / 2". In general, the larger size, better image quality and price. However, a higher density of 1 / 4 "and 1 / 3" CCD chips can now produce as good an image as many 1 / 3 or 1 / 2 "chips.

Number of TV lines in the image of security cameras is a measure of image resolution (sharpness). TV lines more, the better the quality and image resolution. Standard resolution camera may have 350 to 380 lines, more than 400 TV lines is generally considered a good resolution and more than 500 TV lines is considered high resolution. S / W chip cameras produce greater resolution and increased sensitivity to light, thus usable in dark areas where light conditions, most of the time.

On the other hand color cameras offer more realistic and natural. cameras CCTV used are generally divided into different types of camera body.

Professional cameras.

You have to use box-shaped body with the ability to integrate different types and sizes of lenses. Interchangeable lenses allow the camera to monitor objects from virtually any distance. Although for indoor use, which may be in the street, when used in combination with the deck. They are considered the most flexible and widely used by professional commercial properties.

Bullet cameras.

Bullet camera, as its name implies, the spherical housing.

Most of the devices against the bad ball, without the possibility of using different objectives. The main advantage of the boom design small camera and some even bullet camera infrared LED future built. Infrared technology is a light in the infrared spectrum (not visible to the naked eye). This light is lit scene can be seen in total darkness. This is a great future, but only works within a certain distance (usually 10 to 50 feet, depending on model) Vary simple to install and designed estheticly bullet camera is a good choice for residential and Do-It-Yourself installations where monitoring objects are about 25 meters from the camera position (with a standard 3.6 mm).

Board Cameras.

Council essentially fixed camera lens mounted on a PCB. These cameras can be sold in small (mini-camera) or dome (Mini Dome) concentrate or can not be easily installed in the buyer. The purpose of this opening is the industry standard or "hole" in the very small aperture lens. Pinhole lens cameras are often mounted as a "spy" cameras and may be a hidden way of discreet surveillance. The most popular examples of the secret meeting be associated with a smoke detector and motion detector camera.

Since the objective is collected in a room on board, has a fixed aperture and, in general, long, short focal length (wide angle, that is), your flexibility is limited. However, this type of device provides a cost effective solution in the right situation, especially at home. We briefly describe the most popular types of cameras can now talk about how and where to use the mites

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