I had to do a simple still life for a fishing promo but it gave me a chance to shoot with the Zeiss ZF.2 100mm F2 Makro on the full-frame Nikon D700.
This is a manual focus lens with outstanding quality, both in the glass and the build of the lens.
The top shot shows the overall picture while the second shot shows a blow-up of the area of focus. This lens gives great results, I can see why it's so popular.
You can pick one up from http://www.bigcameraworkshops.com/default2.asp