Irrational views on SLT part duex

Started Jan 22, 2014 | Discussions thread
Nordstjernen Veteran Member • Posts: 6,876
Completely wrong

Shield3 wrote:

If cameras were truly "ISO-less" then the inverse would be true - a "properly exposed" ISO 100 shot could be re-shot after setting the camera to ISO 6400 (with nothing else changing) and the images could be recovered to look identical in post.

The exposure has to be within the dynamic range of the sensor - too much exposure, and highlights are blown forever, too little exposure and there are just noise.

  • A sensor has fixed sensitivity
  • An ISO-free sensor will store all the image data in the raw file (with a non-ISO-free sensor clipping will occur)

The rest is understanding exposure and exposure latitude of the sensor (dynamic range).

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