1. to focus or adjust in advance; to set focus beforehand on a subject or target
Usage: third-person singular present tense of 'prefocus'; technical usage in photography, optics, and digital imaging

Examples

• The camera prefocusses on the subject before the shutter button is fully pressed.
• Modern autofocus systems prefocus the lens to ensure sharp images in fast-moving situations.
• The photographer prefocusses on the stage before the performance begins.
• The software prefocusses the image sensor on the detected face.
• She prefocusses her attention on the main speaker during the conference.