ISO 100, OMD-EM1II and firmware 3.0?

Started 2 months ago | Questions thread
Chris Noble
Chris Noble Veteran Member • Posts: 3,155
Meaning of base vs. extended ISO

Architeuthis wrote:

I have installed firmware 3.0 on my OMD-EM1II.

I wonder, whether the new ISO 100 brings better dynamic range, less noise and better colors compared to the base ISO 200, when used for raw files?

Already in earlier firmware versions ISO 64 was available, but as far as I understand it, this does not improve DR, noise or color, but is useful only when too much light is present, to maintain wide aperture and increase exposure time...


Base is the lowest analog gain before A/D conversion. It's the lowest noise setting.

Extended (top and bottom of the range) is digital manipulation. No SNR improvement. And only useful for shooting JPEGs.

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