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Thread: Is ISO fake?

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  1. #1
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    Is ISO fake?

    I saw this video and it raises some issues I am not sure about.

    https://www.youtube.com/watch?time_c...&v=QVuI89YWAsw

    Interested to know what other people think.

  2. #2
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    Re: Is ISO fake?

    And a response from Fstoppers

    https://www.youtube.com/watch?v=EvJ-H_xl3zE

  3. #3
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    Re: Is ISO fake?

    haven't seen the videos yet; however iso is likely "fake" if compared the ASA of film speed. Yet Iso does play an important role when the need for speed in required when the light is less or the subject is fast

    There is so much of this techo **** out there that really means very little out in the paddock . And all it does is make digital photography more complicated and harder than it is

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    Re: Is ISO fake?

    Whether it is 'fake' or not is of no importance to me. I get to know what ISO range the cameras I have will produce acceptable image quality through practice, and I'll try to work within that range. (They are all different and certainly the Full Frame Sony has the best low light performance).
    My go to setting is always 'auto ISO' unless it's important to me to lock it in to avoid excessive graininess such as in night shots or ND use.
    Yesterday I did my normal lunchtime walk in harsh light conditions. (Bright sun through shady trees). Took some bird shots with my APS-C Sony @ 400 mm as JPEGs.

    Settings for this sample: F5.6, 1/1000, ISO 1000.

    Original SOC only resized. Processed to:
    Original.jpg Tawny Frogmouth.jpg

    For me this was a good result given how far away the bird was, and that I was shooting into the sun from the shade.
    Not a wall hanger I know, but a good record of the bird using a combination of camera settings and processing.

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    Re: Is ISO fake?

    A crit of vid by Thom Hogan is at dslrbodies
    I'm not allowed to post a link.

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    Re: Is ISO fake?

    Quote Originally Posted by Ziggy99 View Post
    A crit of vid by Thom Hogan is at dslrbodies
    I'm not allowed to post a link.
    Incredibly detailed and mostly way over my head... I think in summary the conclusion was that ISO wasn't Fake, but I stand to be corrected there too.

  7. #7
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    Re: Is ISO fake?

    Helps I think to see ISO increases not as increases in sensitivity but in amplification, which is why the noise to signal ratio gets worse.
    And how they amplify and label changes is up to the maker.

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