Dynamic range
We have not seen any four thirds cameras offer a dynamic range much over 10EV. This performance falls short of most APS-C cameras, which typically have dynamic ranges of over 12EV. We do not have the official figures for the OM-D E-M5, but looking over my images there is no reason to suspect that the E-M5 is any better than its peers. Using a smaller sensor means the dynamic range is compromised more than a larger sensor would be when using higher ISO ratings in low light.
In recognition of its limited dynamic range, there are a number of exposure bracketing options and a shading compensation tool to give extra detail in shadow areas.
Image: Here the OM-D E-M5 struggles to record the range of tonal information in a single frame. On the right is a ±2EV bracketed sequence over five frames, processed through basic HDR software. Another option in-camera is the image overlay, for up to three frames
