developing 400 ISO as 200??

Discussion in '35mm Cameras' started by bloke, Sep 25, 2003.

  1. bloke

    bloke Guest

    hi,

    I have exposed an ilford Delta 400 b&w film as 200 iso. I forgot to
    change the camara settings to 400( oh stuped me)

    SO my question is can I develop this film as an 200 or? I have been
    pressing film from 400 to 800 but never to a lover iso.
    will this work ok?

    thanks

    cheers
     
    bloke, Sep 25, 2003
    #1
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  2. Yes, it will.
    You must shorten the developing time. By how much is a matter of experience,
    and i do not have that with this film, but reducing developing to 70% of the
    recommended time should be about right for one stop overexposure.

    You will see that as a result of this the contrast will be lowered, and then
    perhaps never want to expose an ISO 400 film as ISO 400 again... ;-)
     
    Q.G. de Bakker, Sep 25, 2003
    #2
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  3. bloke

    Alan Browne Guest

    It will be over exposed by one stop. No big deal, might even increase
    detail in some parts of the image. Process normally.

    You could ask for reduced developer time (pull) to compensate, but it is
    probably not worth the hassle or extra cost.

    Alan.
     
    Alan Browne, Sep 25, 2003
    #3
  4. I disagree. Contrast will be terrible.
    Probably more detail lost than gained.
    No extra cost if you do it yourself.
    So definitely worth the hassle.
     
    Q.G. de Bakker, Sep 25, 2003
    #4
  5. bloke

    Hickster0711 Guest

    I always shoot 400 B/W @ 200. If you like it at 400, then leave it in maybe 2
    mins less. Bob Hickey
     
    Hickster0711, Sep 25, 2003
    #5
  6. I always expose Tri-X 400 at E.I. 250. I second Q.G. de Bakker's
    recommendation to reduce development time by 30%. I think you'll be
    pleased with the results you get, although my experience is that
    pull-processing works better (more noticable improvement of image
    quality) with traditional emulsions (i.e. HP-5, Tri-X) than with
    T-grain films.

    Michael
     
    street shooter, Sep 25, 2003
    #6
  7. The ISO ratings of films are the highest they should be generally used
    at. The ISO speed is NOT the speed that delivers the highest quality
    images. One stop more exposure with 25% less development will give you
    great negatives.
     
    Michael Scarpitti, Sep 26, 2003
    #7
  8. bloke

    bloke Guest

    thanks !
     
    bloke, Sep 26, 2003
    #8
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