4 ms·

OK. I have no first hand experience, but I saw that Helicon makes a product which incrementally adjusts a camera's focuser. https://www.heliconsoft.com/helicon

• dylan604 6y ago
  Communicating directly with the lens' focus motors does sound more appealing and more compact than a sliding rig. However, "Helicon FB Tube automatically shifts the focus by one step with each shot thus producing a stack of images of unlimited length that can be rendered into a fully-focused image." That would mean that it is waiting for a shutter release type of signal from the camera body which would not be useful in shooting video as the original article's workflow.