I haven't quite mastered it yet - even the slightly extended range of the lens I am borrowing at the moment (Sigma 17-70mm F2.8-4.5 DC MACRO) doesn't get me as close as I would like. However, that extra 20mm over the kit 18-55mm on my Nikon D40 is still an improvement, even if still not a patch on some of the other shots here:
Taken at 70mm - see Flickr for
EXIF data.
Wulf