Micro-Nikkor 60mm f/2.8 Macro Lens ("D" or "E" series)
Both of the above lenses are adequate for close/up and macro
work, the 105mm being better for macro (1:1 images), while the
60mm is great for close-up work. I don't use them much anymore,
but I have. The 105mm VR is great for fast-moving subjects like
bees where auto-focus is pretty much necessary.
If you have money to spend, do yourself a favor and get a really
great lens. Your pocket book may regret it, but you never will. They
are that good and spur you on in your progress because they are
so awesome to use.
If you are a "convenience" photographer, meaning you don't want
to be involved with tedious procedures in setting up and taking
close-up shots, you will be happier with one of the two Nikon lenses
mentioned above. Both of the above lenses have auto-focus, but
most good macro and close-up lenses do not and manual focus is