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<blockquote data-quote="WayneF" data-source="post: 216267" data-attributes="member: 12496">The Native ISO is 100, period.&nbsp;&nbsp; That is simply what the sensor does.&nbsp; Its pixels are &quot;buckets&quot; which collect and count photons. After design and manufacture, there is no way to make it count more or less photons (other than exposure, aperture and shutter speed).Higher ISO is simple math multiplications, increasing the counted number by math, but not increasing the photons.&nbsp; Downside is increased noise, due to raising the noise floor by multiplication of numbers (which might not be very important in some cases).Lower ISO is simple math division, discarding the top end of range, losing dynamic range, which is reduced image contrast.&nbsp; It is not about color or image exposure accuracy.&nbsp;&nbsp; Contrast is the range between darkest and brightest tones, and the range is reduced&nbsp; (which might not be very important in some cases).</blockquote>

[QUOTE="WayneF, post: 216267, member: 12496"] The Native ISO is 100, period. That is simply what the sensor does. Its pixels are "buckets" which collect and count photons. After design and manufacture, there is no way to make it count more or less photons (other than exposure, aperture and shutter speed). Higher ISO is simple math multiplications, increasing the counted number by math, but not increasing the photons. Downside is increased noise, due to raising the noise floor by multiplication of numbers (which might not be very important in some cases). Lower ISO is simple math division, discarding the top end of range, losing dynamic range, which is reduced image contrast. It is not about color or image exposure accuracy. Contrast is the range between darkest and brightest tones, and the range is reduced (which might not be very important in some cases). [/QUOTE]

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