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es where you couldn't drive a camera car。 Maybe a helicopter wouldn't be able to get that low； or get that closer to people； or animals； that kind of thing。〃
The camera carriage rides on metal track wheels that grip on to a constantly moving cable。 The cable itself runs in an endless loop powered by a hydraulic engine。 While the word 〃cable〃 normally suggests 〃steel〃； the cablecam uses ropes made of synthetic fiber。 〃This is what's basicall the life blood of everybody on the system。 I guess maybe one of the reasons why you call it a cable is when you pull about ten；twelve thousand pounds of tension on this； it feels like steel when you go up weighs only 500 pounds； a comparable steel cable would weigh at least ten times that； and be far too difficult to move and install。
The cable cam system can cover distance of up to half a mile； quickly accelerating to a maximum speed of 60 miles per hour。 The camera can be operated either romotely or by a cinematographer riding on the carriage。
The system has kept up with many speeding vehicles from motorbikes to kayaks。 But here at legendary race track Churchill Downs； the challenge is to follow the ponies for television coverage of the world's most famous system as unobtrusive as possible； the camera is operated remoteley by radio control。 The cable cam provides the derby broadcast with a never before seen perspective on this most photographed of races。 Given its far ranging capabilities； Hollywood effects artists were quick to seize up on this revolutionary technology。 For the Canadian television adventure series Neon Rider； a cable cam was used to capture a galloping herd of wild horses。 In the past； this king of shot was nearly impossible。 The traditional camera trucks or helicopters used for moving shots would scare the horses； denying film makers such close proximity。 〃We were just slightly above the horses'field of view and right beside the horses； and they just came literally right up and bumped into the dolly； and we were going downhill。 It was about 1；400 foot shot。〃
For the magical fantasy film 〃Three Wishes〃； director Martha Coolighe turned to the cable cam for a crucial effects sequence。 In the story's climactic moment； a young boy soars above the carnival。 A helicopter was used to film high angle aerial shots。 But it was too dangerous to bring the chopper close to the carnival rides for shots representing the young boy's point of view。 For these； Coolidge looked to the cable cam。 〃What was great about the cable cam is that it can go very fast and change its perspective。 It has a real incredible feeling （of） speed and flying at a lower attitude than a helicopter can be。 〃Footage of the young boy flying was photographed against a green screen； a temporary background often used in filming effect shots。 The images from the cable cam and green screen shots are combined in post production along with the finishing touch of computer generated fireworks。l The entire sequence is overseen by Academy Award winning visual effects supervisor Phil Tippete。
In the completed scene； the boy takes to the air with the greatest of ease； and illusion generated by a battery of effects and a highly ingenious camera system。
The End
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