Originally posted by awaldram The d600 when set @6400 is actually shooting @4870 an old Nikon trick they've done on all their cameras to catch the unwary !
I know about the problem of true iso vs. camera setting.
Testers could have shot manual and equalized brightness in post. Note that I criticized the test, not the K-3. It is the testers who claim to see equal noise ...
BTW, the K-3 made a 1/3 stop shorter exposure but the final image is darker too. Both effects should about cancel out when doing a visual inspection of noise in darker areas.
I now looked at the other example too, ISO 6400 with the red fruit (whetever it is called in English
). Here, both cameras used the same exposure, i.e., are not affected by the difference in camera iso. And the diference in noise is at least as large (unfortunately, the K-3 image wasn't focused exactly enough to have any detail in exact focus -- maybe, easiest is to compare the out-of-focus brick wall).
Originally posted by Rorschach I am sorry but I am not seeing what you are seeing. I also opened the 6400 samples. Yes, there is more noise in the K3 samples but there also seems to be more detail.
I looked in particular at the center of the tree leaf image. Just below the brown tips. IMHO, the difference in noise is obvious and looks like a one stop difference to me personally.
Any difference in detail would be due to focus and DoF, as there are no noise reduction differences involved here.
I think too that our little conversation shows how subjective and emotional such discussions quickly become if no rigorous standard for testing has been established. DxO is really to praise for their achievements. I don't see them overrated at all. Not everybody interprets results correctly though.