subject: Choose a surveillance camera [print this page] Choose a surveillance camera Choose a surveillance camera
If the types of cameras, which is selected within and outside the home, the properties of these devices must be considered used. Four factors to be considered are the national surveillance system% u2019s the camera focal volume sensitivity to light, lines, and if% u2019s color or black and white.
Camera focal length is the distance (in mm) lens to the point where the image is correct. Most surveillance cameras InFocus area is 3.6 mm (mm), which is usually an overview of the room where the unit is installed in a corner of the ceiling. Longer focal length 6.0 mm, provides a higher magnification images, such as face, hands, etc. from a distance.
Light sensitivity Light sensitivity of the camera is measured in lux (lumens). One lux is the same amount of light produced by a candle from one meter. Number of Lux Chamber shows that the minimum light camera should take pictures to clear. These cameras are less than 1.0 lux to take pictures in very low light. Although the rooms 0 Lux, surveillance cameras, most are around 0.1 to 0.8, it can take pictures in low light.
Lines the resolution, represent the number of horizontal lines form the camera captures images. For example, a TV, which is usually 300 lines, but often support multiple displays (800 rows is common). This means that high-resolution images from the camera is easily identifiable. The device, which produces several lines: a better picture monitor (if your monitor may reflect the resolution of the camera.) Standards between 300 and 600 lines. But the higher the resolution, the more expensive camera.
Color is another consideration in choosing a camera is so black and white or color. In most plants, black and white, it is probably reasonable, but some owners can install (and pay) of a color camera .
