Light sensitivity of all cameras
2010-01-13 18:36:41
Light sensitivity of all cameras is quoted in lux value, which determines the minimum level of illumination, which requires the camera to display images with a level of video signal 50IRE (level contractually required in modern CCTV2 systems, where 0IRE - painting a dark 100IRE - a clear picture). It should also be noted that the sensitivity of the camera is closely linked to the three parameters, namely the clarity of the lens (expressed in values of F), the shutter speed and level AGC signal gain vision. In most cases, the sensitivity of the camera is administered at a specific brightness of the lens. Often, the manufacturer of the camera gives the sensitivity for a particular clarity of the lens, however, ignores the fact that the level of video signal, which can be eg 30IRE and is obtained at a free Snapshot, resulting in a false information. Such an approach manufacturers makes the practical application of the camera does not work like we wanted to, because in low-light displays darkened image, which is devoid of much detail.
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