ISO 100, OMD-EM1II and firmware 3.0?

Started 2 months ago | Questions thread
Richard Turton Regular Member • Posts: 238
ISO 100 Compared to Overexposure

Can the same results as ISO 100 be obtained by over exposing ISO 200 by one stop?  The answer is no.  The Signal/Noise Ratio of ISO 100 is almost a full stop better than ISO 200 overexposed by one stop.  The available headroom is lower with ISO 100, but as long as clipping does not occur you will get less noise with ISO 100.

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