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Jane
Tel:+86 13714507157
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Bill:
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Maggie:
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Shirley:
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Irene:
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Add:7F,Building C, Dongcai Runfeng Industrial Zone, Gushu, Xixiang Town, Bao'an District, Shenzhen, China. Contact Now

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car black box dvr aperture size affect night vision effect

  • Author:tracy
  • Source:http://www.tigloncn.com
  • Release on :2014-12-13

  An aperture is used to control the light through the lens, the amount of light entering the inner surface of the photosensitive body means, it is usually within the lens. Aperture size is the value of the expression we use f. For already made a good shot, we can not arbitrarily change the diameter of the lens, but we can join in the lens inside the polygon or circular, and variable-area porous grating to control the amount of light through the lens, this device is called the aperture.
  The role of the iris is to determine the amount of light the lens. In the shutter remains unchanged, the value F behind the smaller the larger the aperture, the more the amount of light, the picture is brighter; higher the value, the smaller the aperture, the less amount of light into the picture darker. That F value smaller car black box (other parameters constant), the better night shooting. So car dvr camcorder, in the case of identical parameters, the case of the smaller aperture value, the better night vision, so the price will be relatively expensive. In fact, many affected car dvr camera night vision parameters, the aperture size should account for a large proportion, and now some of the car dvr black box in infrared lights above the fuss, 8 to 10 or more, are not as good the parameters of the lens, look, after all, the power of the infrared small, it can not play a role too.