The term 'Camera Lens Function' can be summarized by the 9-letter word 'Autofocus'. Autofocus is a feature of modern cameras that allows the lens to automatically adjust its focus on the subject of the photograph. This feature is especially useful for capturing fast-moving subjects, as it eliminates the need for manual focusing. Autofocus is also helpful in low-light situations, as it can quickly and accurately adjust the focus of the lens.