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shooting with cfl


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#1 ashraf islahuddin

ashraf islahuddin
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Posted 27 September 2007 - 09:06 AM

Hi, i am acinematographer based in New Delhi,India.I am going to shoot an office interior with a lot of CFL on the ceiling.Am shooting it on Super 16,any piece of advice,regarding cast and flicker problem?Please help.
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#2 Michael Nash

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Posted 27 September 2007 - 03:44 PM

"CFL" means "Compact Fluorescent," the screw-in bulbs designed to replace regular incandescent bulbs. If you're in an office you're probably talking about regular fluorescent tubes. The difference is that CFL's usually have only a minor amount of green in the spectrum, while some fluorescent tubes may have a lot of green depending on the type.

We've discussed shooting under fluorescent hundreds of times here, so search the archives for more information. In short, you'll want to balance all your lighting to the same color temperature and same spectrum if you want the lighting to appear all one color.

With a crystal-synch motor you can shoot 24fps under 60Hz. power or 25fps under 50Hz. power without flicker. If you want to shoot 24fps and the power supply to the lights is 50Hz., you'll need to use a 172.8ยบ shutter angle to avoid flicker problems.
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#3 Richard Andrewski

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Posted 28 September 2007 - 07:11 AM

Michael's right that the linear fluorescent tube is most common in offices but one correction: a CFL, while its commonly thought its just the screw in, self-ballasted type also encompasses many families including some without ballast in the base like the well known 55w biax tube used in so many pro lighting fixtures and many other small plug in types of lamps which have a seemingly endless array of different socket types. Much of the T5 family is also included in being of a "CFL" type. CRI in most CFLs these days is around 82 average but some are lower and some higher.

http://genet.geappli.....t Fluorescent

http://genet.geappli...l=TXT_PROD_DESC
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