autofocus - an optical device for focussing a camera or other instrument automatically optical device - a device for producing or controlling light Based on WordNet 3.0, Farlex clipart collection. See more. Also: auto-focus. The methods are named by the used sensor: Active, passive and hybrid. noun. Modified entries © 2019 by Penguin Random House LLC and HarperCollins Publishers Ltd. Manual focus, by comparison, is when the photographer controls their lens' focus by hand, usually turning a focus ring on the lens. Modern autofocus can quickly focus on, and track, the desired subject with the press of a … An autofocus (or AF) optical system uses a sensor, a control system and a motor to focus on an automatically or manually selected point or area. Auto-focus A type of camera lens that can adjust the distance of what is in focus (focal length). autofocus - Computer Definition. Autofocus definition, having the ability to focus automatically: an autofocus lens; an autofocus camera. A feature of all digital cameras that automatically aligns the lens to make the subject in the image sharp (in focus). © 2003-2012 Princeton University, Farlex Inc. An autofocus optical system uses a sensor, a control system and a motor to focus fully automatic or on a manually selected point or area. Autofocus methods are distinguished by their type as being either active, passive or hybrid variants. 2. such an ability. An electronic rangefinder has a display instead of the motor; the adjustment of the optical system has to be done manually until indication. Most material © 2005, 1997, 1991 by Penguin Random House LLC. Definition of autofocus. : an automatic focusing system (as on a camera) ‘Don't expect to find autofocus or any to other ‘latest features' type stuff on them.’ ‘There's no autofocus, no auto-exposure, no auto-film-winding, no auto-nothing.’ ‘A bottom end camera body, but with autofocus.’ ‘Manual-focus cameras use a linear polarizer, while many autofocus … Pressing the shutter button halfway down generally …
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