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ISO 50 - Reduced DR on original DP's

Started Aug 18, 2015 | Discussions thread
(unknown member) Senior Member • Posts: 1,857
Re: ISO 50 - Reduced DR on original DP's
1

SRT201 wrote:

Interesting. So there's no gain on the imager and it's all just a matter of underexposure and multiplication during the development stage.

In that case then the ISO 50 with -1 compensation should be identical to ISO 100's normal exposure. Correct? Fairly easy to test.

That's correct in theory, but since SPP is correcting the "overexposure" of ISO50 internal, it might be slightly different than ISO 100.  Same with the ISO-less SD1, it's theoretically the same if you under expose ISO 100 by 2 stops or choose ISO 400. The RAW data would be the same. But SPP is interpreting the image in a way that we can't control, so the result is slightly different too.

Are the Quattro's ISO-less as well?

Quattro, SD15, DP1x and DP2x are different, because they have an AFE (analog front end)

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