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2- The next step is to determine the power source
for the camera. Most cameras require 12VDC or 24 VAC. A two conductor wire 22 gauge or bigger
is recommended to be installed along with the RG59
coax cable to connect the camera. The power wire can be installed from the camera to the
nearest outlet. It is preferred to run the camera power to the outlet nearest the
monitor or VCR for easy troubleshooting if a problem were to occur. 4- Some cameras have manually adjustable lens. The lens usually have two adjustments, one for light and the other for focus. The light control ring adjusts the iris to allow the amount of light needed for optimal video picture. The focus ring allows for the fine tuning of picture clarity. First adjust the light level and then adjust to the desired focus setting. Once this process is complete be sure to check the light level again to ensure the sharpest picture available. If the camera is to be located where lighting conditions vary, be sure to have a camera that is equipped with an auto-iris lens. This will allow for automatic adjustment of the lens as lighting conditions change.
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