CCTV camera installation is a complex process that involves finding the right spots for placing the cameras, drilling holes through walls and other surfaces, running the wires for video and power, and mounting the surveillance cameras securely in place. When this is done, the surveillance cameras must be adjusted to ensure that the field of view is not affected by the prevailing lighting conditions. A camera's sensitivity to light determines its ability to provide usable video images under various lighting environments.

Factors that Affect CCTV Camera Sensitivity

1.    Lens Aperture

The aperture of a lens is responsible for regulating the amount of light that reaches the camera's sensor. The aperture size is denoted as F1.0, F1.4, and F2.0, to represent theWhy is Camera Sensitivity Important in CCTV Camera Installation percentage of light that is allowed to pass through to the sensor. F2.0 allows only 5%, whereas F1.4 and F1.0 allow 10% and 20% respectively. In effect, the lens aperture can be used in determining the suitability of surveillance cameras for different applications, depending on the existing lighting conditions. For instance, an F2.0 lens is ideal for brightly lit environments since it allows minimal light to pass through. On the other hand, F2.0 lens is ideal for poorly lit and low lighting environments.

2.    Surface Reflection

The ability of different surfaces to reflect light is an important consideration during CCTV camera installation. Each surface has a varying percentage of reflectance, which in turn affects the camera's sensitivity. For the best results, CCTV surveillance cameras should be focused on surfaces with high reflectance rate such as white washed walls.

3.    Camera Housing

Camera housings come with a glass window at the front, which reduces the amount of light that reaches the camera's sensor.

4.    Lens Quality

 The quality of a camera lens affects its ability to transmit light. In effect, high quality lenses such as the aspherical lenses are more efficient in light transmission, than the standard camera lenses.

5.    Spectral Response

Spectral response refers to the manner in which your camera lenses and sensors react on exposure to the various light spectrums.

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