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Kind of both? You've usually got a small motor connected to the lens that turns the focus ring. A dedicated person, called a focus puller, has a remote with a
by kuschku 3y ago
Kind of both? You've usually got a small motor connected to the lens that turns the focus ring.
A dedicated person, called a focus puller, has a remote with a wheel on the side. By turning this wheel the focus puller can remotely control the focus ring of the lens.
The remote usually allows the focus puller to set the maximum range of motion with A/B points. The system doesn't automatically execute the focus pull, but with the hard stops at the A/B points the focus puller can make sure they don't overshoot the target.
- thirdsun 3y agoAt that point it sounds easier to have the focus switch executed automatically with all relevant parameters preset, e.g. duration or curve. Sort of like CSS transition or MIDI automation.
- kuschku 3y agolook at this video: https://www.youtube.com/watch?v=6AsGgR9oZak https://www.youtube.com/watch?v=6AsGgR9oZak Back then the focus puller would use a remote connected by a cable, which is why you see a focus puller running behind the steadicam op in that video. That's why while you've got A/B points set and marks set on the focus control, you still need a human.