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- Q4121869 subject Q6147958.
- Q4121869 subject Q8945213.
- Q4121869 abstract "The film gate is the rectangular opening in the front of a motion picture camera where the film is exposed to light. The film gate can be seen by removing the lens and rotating the shutter out of the way. The film is held on a uniform plane at a calibrated distance in the gate by a pressure plate behind the film.Occasionally, as the film passes through the gate, friction can cause small slivers of celluloid to break off and stick in the side of the opening. This debris is called hairs. A "hair in the gate" will remain in front of the film and create a dark line that sticks into the edge of the film frame as the camera is filming a shot. A hair can ruin the shot and is almost impossible to fix in post production without being removed digitally.Because of the intractability of this problem the 1st Assistant Camera (in the UK this position is known as focus puller) will open the camera and examine the gate for hairs at the end of each shot. Normally the assistant director will call out "check the gate" when the director is ready to move on to the next shot. The crew will wait until the focus puller calls out "gate is clean." If the gate is not clean, it will be cleaned with orangewood sticks and canned air and the crew will take the shot again. A good camera crew usually checks all cameras and magazines during equipment checkout with scratch tests using fogged film rolls — this will catch out any possible scratch or hair problems caused by faulty equipment. However, a variety of other factors including environment, humidity, type of film stock, camera position, film ridging, and lacing can each be responsible for a "hair in the gate". Generally, skilled crew and regularly inspected tested equipment make this a rare occurrence, and it is not unheard of for assistants to go for months without seeing one, even on large-scale shoots. The cinematographer Oliver Stapleton praised his assisting team on Casanova for not having a single hair or scratch for the whole shoot, even though large portions were shot on dusty exteriors.Video cameras do not have this problem, as any malfunction to the sensor will render the entire system useless. The Arri D-20 and D-21 system, however, does have removable lenses and a rotating optical shutter, which means that the CMOS sensor can be exposed in much the same way as a film gate and thus needs to be kept assiduously clean.".
- Q4121869 wikiPageWikiLink Q11207.
- Q4121869 wikiPageWikiLink Q1639269.
- Q4121869 wikiPageWikiLink Q1757008.
- Q4121869 wikiPageWikiLink Q18379059.
- Q4121869 wikiPageWikiLink Q192234.
- Q4121869 wikiPageWikiLink Q21067571.
- Q4121869 wikiPageWikiLink Q222344.
- Q4121869 wikiPageWikiLink Q235783.
- Q4121869 wikiPageWikiLink Q2995890.
- Q4121869 wikiPageWikiLink Q3276547.
- Q4121869 wikiPageWikiLink Q335095.
- Q4121869 wikiPageWikiLink Q3355098.
- Q4121869 wikiPageWikiLink Q364330.
- Q4121869 wikiPageWikiLink Q5526336.
- Q4121869 wikiPageWikiLink Q6147958.
- Q4121869 wikiPageWikiLink Q648877.
- Q4121869 wikiPageWikiLink Q8945213.
- Q4121869 wikiPageWikiLink Q942958.
- Q4121869 wikiPageWikiLink Q967126.
- Q4121869 comment "The film gate is the rectangular opening in the front of a motion picture camera where the film is exposed to light. The film gate can be seen by removing the lens and rotating the shutter out of the way. The film is held on a uniform plane at a calibrated distance in the gate by a pressure plate behind the film.Occasionally, as the film passes through the gate, friction can cause small slivers of celluloid to break off and stick in the side of the opening. This debris is called hairs.".
- Q4121869 label "Film gate".