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ISO 50 - Reduced DR on original DP's

Started Aug 18, 2015 | Discussions thread
PrebenR Veteran Member • Posts: 4,164
Re: ISO 50 - Reduced DR on original DP's

Kendall Helmstetter Gelner wrote:

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.

"In theory there is no difference between theory and practice. In practice there is."

- Yogi Berra

Are the Quattro's ISO-less as well?

All of the Sigma cameras are.

That said, when using SPP to actually process the raw files they do not behave as if they were ISO-less.

You should test and see what happens (especially in the shadows), but I agree with the statement that you lose about a stop of highlight recovery.

I thought the Quattros had AFE. If it is only in SPP, then it would be interesting to hack the RAW images of the Quattros to change ISO. Roland, any pointers?

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