I needed the high ISO for low light and no flash. I'm still trying to get a feel for high iso/lens combinations --playing and testing LOL I use Dfine 2.0 to take out the noise (and there was a lot with this shot) If you try to take out all the noise with Lightroom it will degrade the picture quality.
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I asked because I have been experimenting with Higher ISO. Back in the day, the highest ASA I would use was 400. Shooting indoor sporting events I would go to 1000; but a print larger than a 3"x4" was extremely grainy. There is a lot of noise on my D90 when shooting at 1000 ISO and higher. The D700 lets me get up to 3000 without a lot of noise, but it is still noticeable.
Practice, Practice, Practice. Your answer above helps out even more. Thanks