Originally posted by ElJamoquio "The" difference? I wouldn't say that, personally, as there's a ~1/2 a stop difference at 1600 ISO, or roughly, the K-3 has the same DR at 1400 ISO that the K-5 has at 2400 ISO.
I don't believe you can tell a difference. I looked at the K-01/K30 dynamic range curves on DXO Mark and they exactly overlap the K3 curve. But I would tell you as well that I cannot tell the difference between a K-01 and a K5 file when it comes to processing. Not at high iso and not at low iso. They are close enough that if I don't know which camera took a photo I couldn't tell just by looking. In addition, DXO Mark says that at iso 1600, the K3 file will have 9.85 EVs of dynamic range, the K5 will have 10.02 EVs. That isn't "half a stop" of dynamic range difference is it? If you can really tell the difference between .15 EVs of dynamic range, you have amazing eyes.
Oddly, the sports iso score for the K3 is actually higher than for a K5 II for what it is worth -- that is the number at which dynamic range drops below 9.
The only thing I can think is that you have the screen and not the print button checked on the DXO Mark graphs, but that screen button is pretty worthless in my opinion.
And the difference between iso 1400 and 2400 is closer to three quarters of a stop, not a half stop, but as I said above, not sure where that number came from in the first place...