Noise settings compared

Here you can see the noise/sharpness tradeoff of the various in-camera noise-reduction settings. I tend to think the default choice--Normal--errs a little too much on the side of softness. The grain visible when set to Low is fairly unobtrusive, but the image is noticeably sharper. (ISO 3,200, f/5.6, 1/80 sec, automatic white balance)