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During daylight the no ir camera is working correctly. But i wish to take photo during the night o very low light I add a IR led lighting (850 mn) and suposedly strong enough but I get a black photo. is it needed a special config or parameter with raspistill ? Or is it necessary to have a special IR lighing?

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    if you shine the led direct at camera do you get any white spots?
    – Piotr Kula
    Nov 30, 2014 at 21:38

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The parameter is -ex night. IR led 850nm is correct. As ppumkin writes check IR led's function - if you see nothing, point to the cam with your TV's or similar remote controller - press a button on it and you should see light.

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