Forum: Pentax K-3 & K-3 II
03-07-2014, 06:09 PM
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Sorry Vincent, I hate to be "that guy," but first of all . . . that's ISO 4000 per flickr, not 6400.
But even so, I have a hard time believing that there is NO noise reduction. The total lack of chroma noise just simply isn't consistent with that.
It's possible that you're not intentionally applying any NR, but I think there has to be some being applied somewhere in the process, either in-camera, or via some default baseline settings in development software.
Frankly, that looks about like ISO 800 on my K-5.
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