Light and surveillance

CCTV as a successor of photography required to comply with the light. To understand the importance of lighting in the video, we will address to the origin of the word "photography" - the word is of Greek origin and comes from the words φως, fos (light) and γραφις, grafis (nib, brush " ) or γραφη, columns, indicating together "painting with light”. In low light achieve high image quality is difficult, even the camera and lens can provide a perfect picture. The reason is that in reducing the brightness diaphragm expands, the depth of the hardness decreases and most sites have a blur image. The cameras are available with different parameters in terms of their ability to capture in a different light. The cameras, suitable for operation in light of more than 1 lux, should be used only in well-lit rooms. Cameras used for video recording at night, usually equipped with infra-red source.