Long Exposures with Velvia 50

Discussion in 'Color: Film, Paper, and Chemistry' started by Dikaiosune01, May 24, 2011.

  1. Dikaiosune01

    Dikaiosune01 Member

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    What kind of colour correction filters do i need?
    How much exposure compensation do i need?
    I know the data sheets do not suggest anything longer than 30 seconds, i want longer, like 4 minutes.
     
  2. Pinholemaster

    Pinholemaster Member

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    Best way to know is the test it with long exposures and various filter combinations.

    Begin with what is listed for 30-seconds, and then extrapolate.
     
  3. timparkin

    timparkin Member

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    Never had a problem with exposures up to four minutes... you might get a slight colour shift (above and beyond the normal velvia shift) but it's best to test.

    I wouldn't bother with anything unless you have seen problems with your particular work.

    It's suggested that a magenta cc filter is used but with velvia already slightly magenta, this seems like a recipe for disaster :smile:
     
  4. Dikaiosune01

    Dikaiosune01 Member

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    But at four minutes (for example) what kind of exposure compensation did you need?