E-M5 Firmware update... V 2.0 today..

Started Jan 29, 2014 | Discussions thread
Iliah Borg Forum Pro • Posts: 23,965
Re: Incorrect Explanation

Note that ISO 12232:2006 includes the Recommended Exposure Index that allows manufacturers to specify an ISO value that produces well-exposed images.

Not well-exposed but images that appear to have correct brightness, while that brightness is just a result of the tone curve and have little to do with exposure per se. ROI does not put strict regulations on noise, while acceptable noise is one of the criteria of well-exposed image.

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