These are with no noise reduction and no sharpening. The photos would of course appear much better with the proper amount of sharpening an luma/chroma NR but here I removed them to reveal the noise and detail.
Click on images for full size version.
ISO3200 1/30s f5.6 Pentax 18-135 WR
No PP except turning down sharpening, luma NR and chroma NR to zero as requested.
ISO3200 1/60s F2.8 Tamron 90mm macro
No PP except turning down sharpening, luma NR and chroma NR to zero as requested.
ISO 4000 1/320s f8.0 Sigma 150-500 @500
This photo has some rather extreme PP to avoid blowing out details of the surf (for which I also underexposed somewhat) as well as to mitigate the very poor contrast caused by the salt spray mist. To make things more difficult this is actually a crop about 2/3 width, effectively magnifying the image (and the noise) somewhat.
As with the other two I turned down sharpening, luma NR and chroma NR to zero to reveal the noise.
The chroma NR becomes quite ugly when turned down to zero but I never see any reason to turn it down as it does no noticeable harm to the image even when turned up pretty high. In these photos it is only the last one though that suffers when chroma NR is turned off completely but keep in mind that the rather extreme boosting of shadows and saturation makes this shot equivalent to a much higher ISO than the 4000 at which I shot it.
PS: I'm having some trouble uploading the last two full size images - it seems to be taking forever, so if you cannot see them you may need to check again later.