Why Use True Day/Night CCTV Cameras?
A closed-circuit television (CCTV) camera that performs well during daytime is no guarantee that it will perform well at night. True day/night cameras aim for the best of both worlds by using an infrared (IR) cut filter.
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Day vs. Night Quality
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Non-true or standard CCTV cameras are able to switch modes automatically. Daylight is generally recorded in color, and night is shot in black and white. IR light is often blocked out on these cameras so that the color of the daylight recording will not be altered or washed out. IR light, however, can be useful for image quality at night.
IR Filter
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During daytime, true day/night security cameras use an IR cut filter that blocks stray IR light from altering the image color. At night, the filter is automatically pulled away to let in all surrounding light, including IR light. This can result in a cleaner, brighter nighttime image.
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Cost
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While true day/night cameras have more versatility than standard cameras, the price of the systems vary depending on manufacturer. They generally cost slightly more than standard CCTV cameras.
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References
- Photo Credit CCTV_Black_Snake_1 image by Perrodactyle from Fotolia.com
