Yep (I'm missing your name?), I agree with Steve, the 18-105mm VR lens is capable of some cracking pics ... its ME that's the problem, not the lens/D3000
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Getting better though using the manual settings. Got lazy with the 4800 using auto nearly all the time (and I must say it was mostly correct) and its quite some years since I did SLR film.
I have spent some time on sharpening with the help tutorials and Colin/Dave and don't see this as a major hurdle now ... given that I get a good enough starting point capture