I understand that it is the simplest way to explain what altering the ISO-value does in the exposure-triangle, but still: that is misinformation.
When I explain to novices how ISO works, I compare it to the volume knob of an audio-amplifier: it does not alter the power, but can decrease and increase the power that comes out of the speakers.
By increasing the volume, we also increase the noise (although in modern audio systems this is negligible). Most people understand immediately how that also increases the noise and the proof of my explanation is that they can also see that with their own eyes.
That’s why I refer to them as raw files, not RAW files.
]]>This is fundamentally incorrect. The sensor hardware has only one sensitivity and can not be changed without changing to another sensor. The ISO setting in digital cameras adjusts how much analog amplification is applied to the signal coming off the sensor before that signal is converted to digital information.
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