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- Follow_focus abstract "A follow focus is a focus control mechanism used in filmmaking with film cameras and in television production with professional video cameras. It is ergonomic rather than strictly necessary; in other words it does not contribute to the basic functionality of a camera but instead helps the operator be more efficient and precise. It is usually operated by a focus puller (often called the 1st assistant camera, or 1st AC) but some camera operators prefer to pull their own focus (the act of changing focus is called "pulling" or racking focus).The mechanism works through a set of gears on the follow focus that are attached to teeth on the focus ring of the lens. These gears feed to a wheel that, when turned by a focus puller, spins the teeth and thus the ring on the lens. Practically, the device is not necessary as the operator can directly turn the ring on the lens. However, this would place the hand in an awkward position perpendicular to the camera rather than parallel, and turning beyond a certain distance (such as 360 degrees) would be impossible. Sometimes, such a "focus pull" would even be difficult with a follow focus, so an L-shaped metal rod called a speed crank can be attached in the provided square hole at the center of the wheel. Thus, the hand merely has to spin the rod, which turns the wheel. If it is necessary for the operator to stand a short distance from the camera, e.g., if the camera is inconveniently high, a short flexible cable called a "focus whip" can be used.The stationary white disk surrounding the wheel is used by the focus puller to jot down marks, and take care of the focus according to the marks he/she took during rehearsals. A focus puller often uses a tape to correctly measure the distance from the lens to the subject, allowing for accurate marking of the disk.A manual lens is usually a requisite for professional filmmaking. This is because some autofocus lens systems use lasers or infrared beams to measure the distance between the lens and the subject. This technique does not anticipate an actor stepping into the foreground of the frame, nor can it focus on anything not in the center of the frame. Passive autofocus (not needing lasers or infrared beams) systems cannot always adjust quickly enough to sudden changes. The job of the focus puller then is to adjust the focus onto different subjects as well as change, or (follow) focus during movement of the camera onto the required subject, hence the term.A follow focus is usually a compulsory piece of equipment for professional filmmaking, though those with low budgets or cameras not equipped with detachable manual lenses must rely on autofocus systems or turning a lens ring by hand. To make matters worse, most autofocus lenses with a focus ring (such as those on most consumer and prosumer camcorders) are not "true" manual focus lenses—meaning that turning the ring does not directly adjust the elements inside the lens, but rather actuates the internal camera electronics that predict how the focus should go depending on how fast or far the ring was turned. These lenses make precise and repeatable focus pulls difficult, and use of a follow focus impractical. They are sometimes called "servo" focus lenses or "focus by wire" cameras.".
- Follow_focus thumbnail Arri_35II_with_anamorphic_zoom.JPG?width=300.
- Follow_focus wikiPageExternalLink follow-focus.
- Follow_focus wikiPageExternalLink 1051.
- Follow_focus wikiPageExternalLink camera_hacks_a_follow_focus_rig_for_a_few_bucks.html?tk=hp_new.
- Follow_focus wikiPageExternalLink lensfocus_shifter_is_the_simplest_45_follow_focus_attachment_you_can_buy.html?tk=hp_new.
- Follow_focus wikiPageID "512121".
- Follow_focus wikiPageLength "4177".
- Follow_focus wikiPageOutDegree "20".
- Follow_focus wikiPageRevisionID "670640702".
- Follow_focus wikiPageWikiLink Autofocus.
- Follow_focus wikiPageWikiLink Category:Cinematography.
- Follow_focus wikiPageWikiLink Category:Film_and_video_technology.
- Follow_focus wikiPageWikiLink Film.
- Follow_focus wikiPageWikiLink Filmmaking.
- Follow_focus wikiPageWikiLink Focus_puller.
- Follow_focus wikiPageWikiLink Follow_shot.
- Follow_focus wikiPageWikiLink Gear.
- Follow_focus wikiPageWikiLink Gears.
- Follow_focus wikiPageWikiLink Infrared.
- Follow_focus wikiPageWikiLink Laser.
- Follow_focus wikiPageWikiLink Lasers.
- Follow_focus wikiPageWikiLink Lens_(optics).
- Follow_focus wikiPageWikiLink Professional_video_camera.
- Follow_focus wikiPageWikiLink Prosumer.
- Follow_focus wikiPageWikiLink Racking_focus.
- Follow_focus wikiPageWikiLink Television_production.
- Follow_focus wikiPageWikiLink Television_program.
- Follow_focus wikiPageWikiLink File:Abel_Hidalgo.JPG.
- Follow_focus wikiPageWikiLink File:Arri_35II_with_anamorphic_zoom.JPG.
- Follow_focus wikiPageWikiLinkText "Follow focus".
- Follow_focus wikiPageWikiLinkText "follow focus".
- Follow_focus wikiPageWikiLinkText "following focus".
- Follow_focus hasPhotoCollection Follow_focus.
- Follow_focus wikiPageUsesTemplate Template:Unreferenced.
- Follow_focus subject Category:Cinematography.
- Follow_focus subject Category:Film_and_video_technology.
- Follow_focus hypernym Mechanism.
- Follow_focus type Article.
- Follow_focus type Organisation.
- Follow_focus type Article.
- Follow_focus comment "A follow focus is a focus control mechanism used in filmmaking with film cameras and in television production with professional video cameras. It is ergonomic rather than strictly necessary; in other words it does not contribute to the basic functionality of a camera but instead helps the operator be more efficient and precise.".
- Follow_focus label "Follow focus".
- Follow_focus sameAs Schärfeziehvorrichtung.
- Follow_focus sameAs Follow_focus.
- Follow_focus sameAs m.02k4nw.
- Follow_focus sameAs Фоллоу-фокус.
- Follow_focus sameAs Q1630792.
- Follow_focus sameAs Q1630792.
- Follow_focus wasDerivedFrom Follow_focus?oldid=670640702.
- Follow_focus depiction Arri_35II_with_anamorphic_zoom.JPG.
- Follow_focus isPrimaryTopicOf Follow_focus.