Fixed-focus - definition

There are three major types of focus controls are found in camera technology are Fixed-focus, Autofocus, and Manual focus. In autofocus control, the focus over the specific object is automatically controlled or tuned using the camera’s built-in algorithm or focus functionality, it happens using different sensors and a unique image processing engine. In manual focus control, there is a focus ring using which the user can change the focus and get the best possible focus based on the need. But in fixed focus, the focus is permanently fixed and can’t be modified or changed. It is also known as focus-free or pan-focus. The focal length is predefined by the designers of the manufacturers. This technology was used previously in mobile devices, nowadays it is only found in cheap point-and-shoot cameras, action cameras, and so on.