Originally posted by GeneV I process all my shots in Raw, so the in-camera NR is not a factor. I apply NR very sparingly.
This precisely why you're not troubled with losing details in red.....
Originally posted by GeneV Your eyes may be better than mine, but I'm not sure I see Gus's shots the same way you do. The depth of field is so shallow on the shot of the girl, that I couldn't make any judgments at all about the sweater, and the Coke can looks pretty good to me.
I don't think my eyes are any better than anyone else's.
I don't disagree the depth of field is narrow in that shot - but even an out of focus image will show a little more than in the red sweater - probably if the sweater were green (where Pentax is stronger) there would have been more detail - albeit out of focus....
as for the Coke logo - one has to kind of know what to look for - look at the "C" in Cola one can see mottling - somewhat like artifacts/haloing.
Perhaps the best is if I illustrate this - scan of a typical red object -
left is saved with high quality JPG (PSE=10) and the second is lower quality (PSE=4)
I also added the third JPG saved in PhotoImpact 8 (my usual editor) saved at 75% which is actually pretty good/presentable quality - but as one can see in the third crop PI's JPG engine is not particularly good in preserving Red details - this is kind of similar to what Pentax are doing now with their noise reduction
Hopefully when they are shown side-by-side the mottling becomes obvious?
Where Pentax's current noise reduction strategy is weakest is retaining internal details in red.
If you care to look at the thread I linked this also applies to the K7.
But like I said if one turns noise reduction Off then the problem goes away -
but then I have already said that (sorry for the repetition).