Ideally, if you own a Canon DSLR camera, then the is currently the best glass for both insect and flower photography. While the best Nikon macro lens is the . Here are two example images.
Nikon macro lenses are expensive and you want to protect your investment, right? The front element of a macro lens is fragile and if this is damaged you may as well throw the lens away. One of the best pieces of kit you can buy to protect the front element of the lens is a UV lens filter, which is simply a piece of glass that is screwed in to the end of the macro lens.
UV lens filters aren't expensive and there is one to fit all Nikon macro lenses and I suggest heading over to Amazon where there are always deals to be had.
Close-up photographers can really benefit from the CX-format Nikon 1 sensors. The added magnification and greater working distance can be a great help for this style of photography. Of course, be prepared to use a tripod and focus the lens manually, as even slight changes in subject distance will throw your subject out of focus. There are lots of great Nikon macro lenses out there that you can use with the FT1 adapter, including: