Now let’s turn things around, and see what we get for a true raw histogram when we set the exposure so that the in-camera histogram is just short of clipping, which occurs at a shutter speed 1 2/3 stops faster than the metered exposure, and a full stop faster than the correct ETTR exposure. The in-camera histogram looks like this:
The Rawdigger histogram shows how much data we’re throwing away when we use the in-camera histogram for ETTR:
And the Lightroom histogram also indicates underexposure:
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