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Why do I have a clear sharp picture during the day and it is out of focus at night?

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Question added by joseph reaidy , Project Supervisor , Guardia Systems SAL
Date Posted: 2017/06/10
Muneer Ellikkodan
by Muneer Ellikkodan , Site Application Engineer , SecureTech LLC

During daytime , lens will get proper light and if we are using cameras without IR camera will out of focus in night time

Adrian Manalo
by Adrian Manalo , Safety Advisor , Petrofac Saudi Arabia

  • During daytime, the image quality is perfect, however while the old lens obviously adjusted to the changing illumination during dust and dawn, the new lens seems to have problems. The images get quite blurry in the nite. 
  • Your pictures will never be as sharp in night mode however, due to there always being a mixture of visible and infra red lighting. The lens can not simultaneously focus both. 

Govinda Choudhary
by Govinda Choudhary , IT Support , EASYMART Group Of Companies

Due to change in the colour, lens of cctv camera auto adjusts in night mode with IR Leds which results out of focus at night.

joseph reaidy
by joseph reaidy , Project Supervisor , Guardia Systems SAL

This is due to the depth of field changing as the light conditions change and can be easily overcome by following set procedures.

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