Originally posted by the_int21h I've been reading about what people dispute what D-Range is and have seen several examples.
-Brian
It does just use a lower ISO, then expands the levels.
So it essentially underexposes and image then brightens it.
This is why the shadows get murky. I noticed this right away the first time I used the feature.
I don't know if there is an advantage to doing it in RAW yourself. My guess is there is some noise reduction applied, and probably the results with the K20D (as opposed to the K200D) have some on the sensor noise reduction.
So your next test should be to compare the automatic DR expansion vs. Lightroom DR expansion.
Anyway, I actually liked the feature. Most mid day shots aren't going to make the front cover of National Geographic anyway, so I'm not so worried about the murky shadows but appreciate the lack of blown out highlights.
My dog is white, and when taking shots with him in it, in bright overhead sun, this kept his coat slightly less clipped.
I've been saying all along, no reason to leave this setting on. Use it for mid day on the fly shooting but use filtration (double exposures merged, or a glass GND) to equalize your D-range in shots where you can use a tripod. Turn it off for everything else.