Efke IR 820 starting point

Discussion in 'B&W: Film, Paper, Chemistry' started by Rob Skeoch, Oct 5, 2007.

  1. Rob Skeoch

    Rob Skeoch Advertiser Advertiser

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    I'm planning to try some Efke IR 820 this weekend in sheets and expect to use my new IR092 Dark Red Filter.

    Any suggestions on what ISO to start with while using the filter.

    I don't mind doing a bit of testing but don't want to use my whole box of film trying to find a starting point.

    Also when shooting IR on a 35mm you get the little red mark or IR on the lens to reset your focus to.... what do you do when shooting IR on a ground glass?

    -Rob
     
  2. Fotohuis

    Fotohuis Member

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    This is the data sheet of the IR820C film:
    http://www.fotohuisrovo.nl/documentatie/IR820c.pdf

    RG715 (#88A) and R72 will give around iso 3.
    You need some small correction of the distance but I have worked with this film (Maco IR820C, till 2004) in 35mm and 120 roll film only.

    Best regards,

    Robert
     
  3. herb

    herb Subscriber

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    Efke Ir film

    I agree with robert. I have used both sheet and roll, the 3 iso is about right, maybe even a stop more exposure. I developed mine in rodinal 1:25 for about 9 minutes. Negatives look ok, have not printed them yet.
     
  4. dr5chrome

    dr5chrome Member

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    The film is a 100iso based film. start @ 100iso and use the filter factor of what ever filter you are using.

    dw

    www.dr5.com
     
  5. Travis Nunn

    Travis Nunn Member

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    That's exactly what I do. I tested 2 rolls and the best exposed shots were taken using the filter factor of my 89b