Portra confusion

Discussion in 'Exposure Discussion' started by sly, May 10, 2011.

  1. sly

    sly Subscriber

    Messages:
    1,507
    Joined:
    Nov 12, 2006
    Location:
    Nanaimo
    Shooter:
    Multi Format
    So I've got some outdated (2001) 120 film. No box. Foil wrapping is labelled Portra 400 NC. Inside the stickum tape is labelled 160NC, while the paper backing, in smaller letters, is 400NC. Now I believe there are 2 different films - 400 and 160 - referring to the ISO. What do I expose this film at?
     
  2. Diapositivo

    Diapositivo Subscriber

    Messages:
    2,352
    Joined:
    Nov 1, 2009
    Location:
    Rome, Italy
    Shooter:
    35mm
    160, to err on the safe side :wink:
     
  3. eddie

    eddie Subscriber

    Messages:
    2,002
    Joined:
    Jul 24, 2005
    Location:
    Northern Vir
    Shooter:
    Multi Format
    Do you have enough so you can test a roll? If so, shoot half at 160 and the other half at 400.
     
  4. Sirius Glass

    Sirius Glass Subscriber

    Messages:
    20,728
    Joined:
    Jan 18, 2007
    Location:
    Southern California
    Shooter:
    Multi Format
    The wrapper and the paper state 400 NC so I would go with that and shoot it at ISO 400.

    Steve
     
  5. vpwphoto

    vpwphoto Member

    Messages:
    1,203
    Joined:
    Feb 21, 2011
    Location:
    Indiana
    Shooter:
    Multi Format
    Agreed... that is really strange. Twice thid month that I've heard of something like this. Never experianced it in my 20 years though.
    NC is Natural Color
    VC was Vivid Color...
     
  6. Tim Gray

    Tim Gray Member

    Messages:
    1,786
    Joined:
    Sep 2, 2006
    Location:
    OH
    Shooter:
    35mm
    Sounds like it's 400. But if you exposed it at 160, I'm sure it'd come out just fine.
     
  7. Sirius Glass

    Sirius Glass Subscriber

    Messages:
    20,728
    Joined:
    Jan 18, 2007
    Location:
    Southern California
    Shooter:
    Multi Format
    Actually, I have tried this and at ISO 160 the highlights will tend to get blown out. It would be ok at ISO 320, but ISO 160 is "a bridge too far" for ISO 400 film.

    Steve
     
  8. sly

    sly Subscriber

    Messages:
    1,507
    Joined:
    Nov 12, 2006
    Location:
    Nanaimo
    Shooter:
    Multi Format
    I've got 2 rolls. I already shot one at 160, on the theory that overexposed is better than underexposed (....no....really...... I was going for the ethereal look ....yeah.....that's it.... ).

    I'll shoot the other at 400 and let you all know
     
  9. Tim Gray

    Tim Gray Member

    Messages:
    1,786
    Joined:
    Sep 2, 2006
    Location:
    OH
    Shooter:
    35mm
    Really? I've shot newer Portra 400NC/VC 4 or 5 stops over and still had of highlight detail for scenes without crazy contrast requirements.
     
  10. Sirius Glass

    Sirius Glass Subscriber

    Messages:
    20,728
    Joined:
    Jan 18, 2007
    Location:
    Southern California
    Shooter:
    Multi Format
    Older Porta
     
  11. brucemuir

    brucemuir Member

    Messages:
    2,265
    Joined:
    Dec 25, 2007
    Location:
    Metro DC are
    Shooter:
    Multi Format
    compromise and shoot it @ 200 :wink:
     
  12. Thingy

    Thingy Member

    Messages:
    189
    Joined:
    Jul 30, 2008
    Location:
    London, Engl
    Shooter:
    Multi Format
    If only it was like sheet film, then you could use the notches on the film edge to tell you exactily what film you have! :wink:
     
  13. sly

    sly Subscriber

    Messages:
    1,507
    Joined:
    Nov 12, 2006
    Location:
    Nanaimo
    Shooter:
    Multi Format
    So I got the 2 rolls back today.

    First - if I'm going to shoot colour seriously I'll need to find a proper professional lab. I've not shot any colour negs for a few years. This joint used to do reasonably OK work, but I don't think they've dusted their machine in the last couple of years - a bazillion dust spots on the prints.

    Next - the film's definately 400 - it's right there on the rebate. BUT - the roll I shot at 320 is a bit thin, while the one at 160 actually looks much better. The prints don't look overexposed either - no blown highlights. I've uploaded one to the gallery. If I find any more of this stuff in the freezer I probaly will split the difference and shoot at 200.
     
  14. stavrosk

    stavrosk Member

    Messages:
    155
    Joined:
    Jun 10, 2011
    Shooter:
    35mm
    The new portra is true 400 ISO