What does a lens do in a CCTV system?

The function of a lens in a CCTV system is to focus and direct light onto the image sensor within the camera. By gathering light from the environment and concentrating it, the lens plays a crucial role in image clarity and detail. The way in which light is focused can affect the depth of field, zoom capabilities, and overall image quality.

Without a properly functioning lens, the image sensor would not receive the appropriate amount of light, leading to poor image quality or no image at all. This component is essential for achieving clear, well-defined images that are necessary for effective surveillance and monitoring.

In contrast, filtering audio, storing video footage, and transmitting images wirelessly involve different components of a CCTV system, such as microphones, digital storage solutions, and wireless transmission modules. Each of these functions is essential for the overall operation of the CCTV system, but they do not pertain to the role of the lens.