You do not have to, but if you wish to cut down on exposure while helping to create a warmer image with more accurate color a 85 or 81 filter is recommended for shooting in daylight. All negative film is color balanced while printing or scans are made so there quite a lot of some forgiveness. If you will be shooting mostly in daylight we recommend using a standard daylight film like CineStill 50D or Kodak Portra.
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