Back by popular demand: Nex-7 vs OMD

If you set the EM5 to ISO 200 and set a manual exposure of say 25mm f/4 1/100 and set the NEX 7 to ISO 400 35mm f/5.3 1/100 the images should be nearly identical

"Over stating" the ISO is done for auto exposure because they want to preserve highlights so they push process the image. It is pretty typical for cameras to do this, if you compare in manual exposure mode you will be able to identify this as one image will be darker than the other when the RAW files are developed.

As for ISO 50, sometimes manufactures implement a software based ISO setting, i.e. 50 most likely equals 100 over-exposed by 1 stop and pulled down to what would be ISO 50. This will clip highlights, so it isn't going to have any more dynamic range than ISO 100.

Eric

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