If you are shooting with a D30 then you will probably need to Unsharp Mask in Photoshop if you want a crisp image. By default, the D30 does no sharpening, so as to preserve maximum image quality. I don't know how much you know about sharpening, but the process actually degrades an image - the sharpness is just an optical illusion caused by increasing contrast at boundaries. You actually lose detail when you sharpen, tho' superficially it looks like detail is enhanced. Shoot RAW and experiment with sharpening in Photoshop and the D30 is a more than a match for any non-SLR, even more modern ones.
Personally, I sharpen D30 shots for small prints where detail is less important, and use a clean image for larger prints up to 12"x8".
Personally, I sharpen D30 shots for small prints where detail is less important, and use a clean image for larger prints up to 12"x8".