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  • what is the camera filter used to correct tungsten light sources for daylight balanced film?

  • what is the camera filter used to correct daylight balanced sources to tungsten-balanced film?

1
  • 80 filter corrects tungsten light sources to daylight balanced film

  • 85 filter corrects daylight sources to tungsten-balanced film

There are variations - see http://en.wikipedia.org/wiki/Wratten_number

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