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Thread: You probably don't know what ISO means

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    p38arover's Avatar
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    You probably don't know what ISO means

    See You probably don't know what ISO means – and that's a problem: Digital Photography Review

    I must admit I had the wrong idea about ISO.

    The apparent familiarity and simplicity of ISO setting leads to a number of common misunderstandings. Despite what you may have heard or read, changing the ISO of your camera does not change its sensitivity.

    ISO changes the lightness of the final image but it doesn’t change the fundamental sensitivity of your sensor.
    I didn't think noise was "hum"

    It’s widely thought that the additional noise in high ISO image comes from the ‘background hum’ of the sensor’s amplifiers. This feels right: we’ve all heard more hum if we turn up the volume on an audio amplifier. Unfortunately it’s simply not true: most noise actually comes from the light you’re capturing, so it primarily depends on your shutter speed and aperture
    the digital ISO standard is based around ‘correctly’ exposing JPEG midtones.......................That’s not the best way to expose digital. The best results are achieved by giving as much exposure as possible without clipping the brightest tones you care about............
    I'll need to re-read the article again (a few times) I generally shoot RAW.
    Ron B.
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    Quote Originally Posted by p38arover View Post
    See You probably don't know what ISO means – and that's a problem: Digital Photography Review

    I must admit I had the wrong idea about ISO.



    I didn't think noise was "hum"





    I'll need to re-read the article again (a few times) I generally shoot RAW.
    This is not an image I want to see

    I should probably settle down and do some reading myself. I’ve had cameras 📷 most of my life, love taking snaps of where we are etc, but really have no idea what I’m doing.

    Thanks for for the link Ron.
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    I'll have to have a read, thanks Ron.
    Having just gone digital I've just equated noise to film ASA/ISO grain/sensitivity

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    Thanks Ron..... interesting read.
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    p38arover's Avatar
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    Quote Originally Posted by rick130 View Post
    I'll have to have a read, thanks Ron.
    Having just gone digital I've just equated noise to film ASA/ISO grain/sensitivity
    As did I.
    Ron B.
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