How does a CCTV washer extend lens life?


If a screen is dirty the camera/lens if working in auto-focus mode will try and near focus on specs of dirt. The camera will try and fight that as clearly you are trying to view further than a few centimetres.

The tiny lens drive motors are not designed to keep working 24/7 and this will have an impact on their MTBF.

Having a clean screen will prevent this.