As an aside: What is it you want to do with these images? If you just want to share them on the net a 100% sharp focus may not even be needed, as downsizing the image for the net might eat up some of that sharpness anyway. If you want technical perfection that's all well and good, but is it necessary for you? I'm not saying that you shouldn't aim for it, but neither should you dismiss a certain photo just because it doesn't look all that crispy sharp when you zoom in close on your computer. Give yourself time to learn, but please don't think anything that's not picture-perfect can't be used anyway. For example, the image you posted above looks pretty good to me at the size shown in the forum. Nothing wrong with that IMVHO. :-)