Originally posted by Steve.Ledger If Nikon is so much better, buy Nikon. Simple.
No need to be prickly. I don't believe he was trolling. I think he was asking a valid question. And he was given the correct answer. If he's going to shoot JPEG's straight out of the camera, then those sample images are relevant. But if he's going to be shooting RAW, like most advanced users, then those results are not representative of relative image quality.
Here's some observations and sample images I posted recently in a similar thread about the K-30's high-ISO performance. The picture of the toy soldier is particularly relevant, since he was wearing a red sequin top. You can also see the amazing dynamic range of the K-30 image sensor in that photo, since you can still see detail in the white areas, as well as the black areas on his pants:
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My previous observations __________________
From what I've seen, you're not going to get much better high-ISO performance than the K-30 without spending thousands of dollars on a new FF camera specifically designed for high-ISO shooting (and priced for professionals). Comparing the K-30's high ISO performance to any other current APS-C cameras would be an exercise in splitting hairs.
Here are some pictures I shot at
ISO 3200 with my K-30 at a performance of "The Nutcracker" this last December. I shot in RAW, applied a little noise reduction, and then down-sized them to a vertical resolution of 2160 pixels (the native resolution for 4K displays), so they're still fairly large image files. To me, they look very good when viewed at 100%. Lots of detail and not too much noise evident.
Click on each picture for the full-size version: