Portra 160 Real world EI?

Discussion in 'Color: Film, Paper, and Chemistry' started by semi-ambivalent, Jul 12, 2013.

  1. semi-ambivalent

    semi-ambivalent Subscriber

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    My son is going on a hike tomorrow with a few rolls of Portra 160 and a Yashica Electro 35 GSN. I've never used it; is 160 good or might 125 be "safer"?

    thanks,

    s-a
     
  2. polyglot

    polyglot Member

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    Both.

    It does fine at 160 and you will have no problem shooting it at 125. In the latter case, it's a bit of insurance against poor metering technique.
     
  3. Tom1956

    Tom1956 Inactive

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    I like 125 too. A little underexposure and you're cooked.
     
  4. MattKing

    MattKing Subscriber

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    It is a moderate contrast film that withstands both moderate underexposure and significant over-exposure quite well.

    So to be safe, and assuming there may be some scenes with higher contrast, I would recommend rating it at 100.

    If your son has really good metering technique, 160 works well too.
     
  5. Athiril

    Athiril Subscriber

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    160. It was still quite good underexposed when the light faded on me and I had no choice the very first time I used it.
     
  6. TheFlyingCamera

    TheFlyingCamera Membership Council Council

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    You do realize that the difference between 160 and 125 is something on the order of 1/3 stop? You'll NEVER see that difference. 160 vs 100 is still only 2/3 stop. But as others have mentioned, Portra 160 is a very forgiving film. He'll get exposures he's very happy with unless his Yashica's meter is tragically, intergalactically out of calibration.
     
  7. markbarendt

    markbarendt Subscriber

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  8. thegman

    thegman Member

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    I tend to shoot 160 speed films (either Portra or Fujifilm) at 100, but I think in reality, you could shoot either at ASA 25 and they'd still look great, those films are extremely tolerant of overexposure, but barely at all tolerant of under exposure. I just err on the side of going way over if I'm shooting without a meter, or a bit over if I am using a meter.

    Going 1, 2 or even 3 stops over still results in perfectly fine negatives in my experience.
     
  9. BrianShaw

    BrianShaw Member

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  10. tnabbott

    tnabbott Member

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  11. batwister

    batwister Member

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    100 for me. Partly due to using the metered prism, which, like me, doesn't believe in 'half measures'. :smile: 160 still seems a baffling film rating to me. Strange number.
     
  12. DREW WILEY

    DREW WILEY Member

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    The film itself, 160. If you need to skew the reading due to an inaccurate meter or method of reading, that's a different story. But if you do
    need to fudge, a modestly reduced ASA is preferable to a higher one.
     
  13. MattKing

    MattKing Subscriber

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    It is 160, because it reflects the improvements that its predecessor, Vericolour, went through.

    Prior to those improvements Vericolour was ASA (not ISO) 125.
     
  14. Sirius Glass

    Sirius Glass Subscriber

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    The film has such a great latitude why screw with the speed at 125?
     
  15. benjiboy

    benjiboy Subscriber

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    I agree Steve, Kodak have a pretty good idea of the speed of their films, I only up/down rate films if I have a good reason.
     
  16. markbarendt

    markbarendt Subscriber

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    Yep