verb
- adjusting focus in advance of an action or event, especially in photography or optics
Usage: present participle of prefocus; technical/specialized usage; common in photography and cinematography
Examples
- The photographer was prefocussing on the stage before the performance began.
- Prefocussing the camera on the subject helped capture sharp images in low light.
- Modern autofocus systems reduce the need for manual prefocussing.
- The cinematographer spent time prefocussing the lens to ensure critical sharpness during the scene.