expression, ichidan verb
focus on; bring into focus
Used for adjusting a camera, microscope, or other optical device to make the image sharp. Also used figuratively for focusing attention or effort.
カメラのピントを被写体に合わせる。
I focus the camera on the subject.
話のピントを合わせてください。
Please focus the discussion.
More formal and technical than ピントを合わせる; often used in optics or abstract contexts.
ピント is from Dutch 'brandpunt' (focus). 合わせる is the transitive verb 'to adjust, to match'. The phrase literally means 'to adjust the focus'.