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Not from a single image. The reason for the set up is to obtain many images at different focal distances. That can be done by either moving the camera (of any k
by mhb 6y ago
Not from a single image. The reason for the set up is to obtain many images at different focal distances. That can be done by either moving the camera (of any kind) or by changing the focus for each image.
- dylan604 6y agoTypically, it is not done by adjusting focus, and uses a sliding rig to change the position of the focal plane. For most camera lenses, the precision of the focus ring mechanism is too dodgy to precisely change the focus. With the slider, the focus ring is left alone, and the precision of the slider is use to bring the next "layer" into focus. The author even commented on the slider he used was not as precise due to it being belt driven and that switching to a lead screw system would have provided more accuracy.
- mhb 6y agoOK. 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/heliconsoft-products/helicon-fb-tube/ https://www.heliconsoft.com/heliconsoft-products/helicon-fb-...
- dylan604 6y agoCommunicating 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.