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Re: The X-Factor of Fudging ISO
In reply to dengx,
4 months ago
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dengx wrote:
bigpigbig wrote:
18% gray is 18% gray. Period. For a given shutter speed, aperture and ISO ALL cameras should render the same tone.
It is not the case for digital cameras as 18% gray is only one of five viable techniques (the Standard Output Sensitivity (SOS) technique) to do so. You may like it or not but it is the "gain" in digital cameras.
I don't like it. It makes no sense. ISO Standards are useful, essential even for some photographers.
A light meter becomes useless without it and studio flash work would be impossible. It would be shooting oneself in the foot to move completely to a "gain" control.
ISO standard defines it as "Exposure Index rating" (effectively - gain) which is only commonly (mis-) named "iso".
Not only misnamed, but misrepresented. I tend to agree that this is most likely being used as a marketing ploy. Only 1/2 stop to avoid obvious differences.
By these rules, Fuji could call ISO 100, ISO 204,800 and say "look how good our high sensitivity is" "our ISO 204,800 is equal to Canon's ISO 100" but then the jig would be up. Instead they choose to hide the fact with a slight adjustment. No, no, no.
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