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Olympus E-PM2 Actual ISO vs IS0 set in camera?

Started Aug 17, 2014 | Discussions thread
OP Leo Veteran Member • Posts: 6,445
Re: Olympus E-PM2 Actual ISO vs IS0 set in camera? -my TEST

Anders,

I am in the same initial confused state after comparing Oly PM2 with Pana GX1. Based on DXO ISO test and displayed results: the PM2 actual ISO is 50% of the set ISO and the GX1 actual ISO = to the Set ISO.

I have photographed the same subject with both cameras set exactly the same (exposure meter, aperture, compensation, lens) at 0EV compensation and the shutter speed was the same for both cameras. Then have increase compensation for each camera until highlights clipping just started. For both cameras it started at +2EV. I was expecting that GX1 would start clipping 1EV early. I still missing the understanding of actual application of the DXO ISO test.

Pleas help to fill the void

Leo

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