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vin2install

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Posts posted by vin2install


  1. All cameras that have an ICR (Infrared Cut-Filter Removal) is called a TDN (True Day/Night) Camera whether they have IR or not.

     

    All IR cameras can be a day/night cameras without having an ICR and will switch to Black and White at night, regardless of being a digital day night because of the IR's. These cameras will look different during the day because of the IR filter in front of the Image sensor. The filter stays in front permanently so it has to find the right balance of being able to filter out barely enough during the day while being IR sensitive at night. That is why you see colors that are not reproduced correctly. Since it has to be IR sensitive at night there are IR rays coming from the sun too. But if you are inside and away from the windows the colors are able to be reproduced correctly since there is no IR's from artificial lighting.

     

    Color camera has a IR filter that filters the IR's to produce the correct color but is not IR sensitive so it will not pick up any IR illumination.

     

    Digital Day/Night is just a color camera with the DSP taking out the color from the picture to make you believe that it is more sensitive at night. Sometimes these cameras will have an IR filter like the IR cameras without ICR but the DSP will try to correct the colors itself.


  2. Hi Rory,

    It is because of the different type of IR LED's that are used to illuminate the picture. The camera probably has a ring of 15-30 LEDs on the inside. Then on the next ring it uses 45 degree leds. Then go back to 15-30 degree LEDS. Then another ring of 45 degree LEDs. Doing it this way they can achieve the 160' of IR illumination that they are claiming but comes with some drawbacks as you can see the different illumination brightness shown on the rings. They were probably trying to soften the flashlight effect because of the varifocal lens of the camera so they cannot predict what focal length you will be using. If you zoom it all the way in it will be hardly noticeable.


  3. If you have a modem/router than you need to forward those ports twice. Do that on your verizon router to your linksys router. Then do it again on your linksys router to your DVR.

    or

    you can just bridge your linksys router to your verizon router than forward the linksys ports to your dvr

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