Can someone please give me a better understanding of ISO than the standard answer i hear repeated

Started Jun 15, 2014 | Discussions thread
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Zaffa
Zaffa Regular Member • Posts: 398
Can someone please give me a better understanding of ISO than the standard answer i hear repeated

Everyone uses the same word, sensitivity , this is not helping my mind to absorb the concept in detail. Shutter speed is comparably easy to comprehend , and Aperture isn't too hard to grasp , but ISO has me stumped ?

I try to imagine a cameras sensor and lens as a human eye , with the brain imprinting the photons hitting the pupil  in your mind , instead of the cpu and memory card of a camera  , blinking for shutter speed , aperture for how much area of the pupil (sensor)  the eyelids allow , but ISO ..... ? , wearing sunglasses or not  lol

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