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Your manual mentions that Ev0 in the Histogram defaults to -3 stops below FS. This is about 12.5% of FS. Why this choice? Was it based on a standard metering constant i.e. K=12.5 and the setting point for ISO100, or was it based on a typical amount of clipping headroom?

Since 18% of FS is more common, perhaps an option to change the EV0 default to -2.5 stops below FS should be added.

Dan.

When I look at histograms for different cameras/sensors in RAWDigger, the white clipping level seems to vary considerably and is less than 16383 for a 14 bit encoded signal or 8191 for a 12 bit encoded signal.

For example, the clipping level for the 5D Mk II seems to be about 14736 and they are about 11535 on my 600D. For the G12 they are about 3968.