1. to focus (a camera lens or optical instrument) in advance
Usage: photography; optics

1. focused in advance; having been set to a predetermined focus
Usage: photography; optics

Examples

• The photographer decided to prefocus the camera on the stage before the performance began.
• She prefocused her telescope on the constellation before nightfall.
• The prefocus setting allowed for quicker shots during the fast-paced event.
• Many modern cameras can prefocus automatically when you half-press the shutter button.
• The prefocus lens was already adjusted for the correct distance.
• He used a prefocus technique to capture the bird in flight.