What is a pinhole lens used for in surveillance?

A pinhole lens is primarily used in surveillance to enable discreet recording. The design of a pinhole lens allows for minimal visibility and a compact form factor, which makes it easier to conceal within various environments. This inconspicuous nature is crucial in surveillance scenarios where the goal is to observe without drawing attention, ensuring that subjects are unaware they are being recorded.

While image quality is important in surveillance, pinhole lenses may not enhance quality as significantly as other types of lenses. They do not inherently increase a camera's range, which is determined more by the camera's sensor and other specifications. Additionally, the functionality regarding wireless networks pertains to connectivity features that are unrelated to the optical design or purposes of a pinhole lens. Thus, the correct response reflects the primary purpose of using a pinhole lens in surveillance.