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Finally - a Possible use for "High" ISO *** with the Foveon!

Started Oct 22, 2020 | Discussions thread
xpatUSA
OP xpatUSA Forum Pro • Posts: 23,016
Re: Finally - a Possible use for "High" ISO *** with the Foveon!

mike earussi wrote:

xpatUSA wrote:

mike earussi wrote:

xpatUSA wrote:

mike earussi wrote:

It might work with the SD14 or the SD1M but not with any camera with the AFE.

Please tell us why, Mike.

Because iso is only a software tag without the AEF so there's no amplification of the signal.

Thanks for the reminder that the difference between say the SD15 and the SD14 is the location of the ISO gain - before or after the ADC, respectively. Did you try any numbers?

No numbers, just experience. The SD14 shot at iso 50 produced absolutely no noise either in the sky or shadows. I've never seen another camera, either Foveon or Bayer that's been able to duplicate that. The SD15, utilizing the AEF, produced far more noise at all isos and less about 1/2 stop less DR.

Thanks again. I'm beginning to understand your point. I wasn't thinking about noise at all in the OP, only correct exposure and how to get it.

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