focus puller
US /ˈfoʊkəs ˌpʊlər/
UK /ˈfoʊkəs ˌpʊlər/

1.
focus puller, scherpsteller
a member of a film crew who is responsible for adjusting the camera's focus during filming, ensuring that the subject remains sharp and clear as the camera or subject moves
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The focus puller meticulously adjusted the lens as the actor walked towards the camera.
De focus puller paste de lens nauwkeurig aan terwijl de acteur naar de camera liep.
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A good focus puller is essential for sharp, professional-looking footage.
Een goede focus puller is essentieel voor scherpe, professioneel ogende beelden.