This article on high magnification macro photography is written by Junaed Rahman (website | flickr):
Quite sometime ago I wrote an article on macro photography, which explained how to modify a regular short zoom lens for macro photography. This time I’ll explain how do I achieve high magnification. For most of my close-up work I use AF Micro-Nikkor 60mm f/2.8D lens. To me the benefits of using a 60mm instead of 105mm macro lens are: